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MLA In-Text Citations: The Basics

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Guidelines for referring to the works of others in your text using MLA style are covered throughout the  MLA Handbook  and in chapter 7 of the  MLA Style Manual . Both books provide extensive examples, so it's a good idea to consult them if you want to become even more familiar with MLA guidelines or if you have a particular reference question.

Basic in-text citation rules

In MLA Style, referring to the works of others in your text is done using parenthetical citations . This method involves providing relevant source information in parentheses whenever a sentence uses a quotation or paraphrase. Usually, the simplest way to do this is to put all of the source information in parentheses at the end of the sentence (i.e., just before the period). However, as the examples below will illustrate, there are situations where it makes sense to put the parenthetical elsewhere in the sentence, or even to leave information out.

General Guidelines

• The source information required in a parenthetical citation depends (1) upon the source medium (e.g. print, web, DVD) and (2) upon the source’s entry on the Works Cited page.
• Any source information that you provide in-text must correspond to the source information on the Works Cited page. More specifically, whatever signal word or phrase you provide to your readers in the text must be the first thing that appears on the left-hand margin of the corresponding entry on the Works Cited page.

In-text citations: Author-page style

MLA format follows the author-page method of in-text citation. This means that the author's last name and the page number(s) from which the quotation or paraphrase is taken must appear in the text, and a complete reference should appear on your Works Cited page. The author's name may appear either in the sentence itself or in parentheses following the quotation or paraphrase, but the page number(s) should always appear in the parentheses, not in the text of your sentence. For example:

Both citations in the examples above, (263) and (Wordsworth 263), tell readers that the information in the sentence can be located on page 263 of a work by an author named Wordsworth. If readers want more information about this source, they can turn to the Works Cited page, where, under the name of Wordsworth, they would find the following information:

Wordsworth, William. Lyrical Ballads . Oxford UP, 1967.

In-text citations for print sources with known author

For print sources like books, magazines, scholarly journal articles, and newspapers, provide a signal word or phrase (usually the author’s last name) and a page number. If you provide the signal word/phrase in the sentence, you do not need to include it in the parenthetical citation.

These examples must correspond to an entry that begins with Burke, which will be the first thing that appears on the left-hand margin of an entry on the Works Cited page:

Burke, Kenneth. Language as Symbolic Action: Essays on Life, Literature, and Method . University of California Press, 1966.

In-text citations for print sources by a corporate author

When a source has a corporate author, it is acceptable to use the name of the corporation followed by the page number for the in-text citation. You should also use abbreviations (e.g., nat'l for national) where appropriate, so as to avoid interrupting the flow of reading with overly long parenthetical citations.

In-text citations for sources with non-standard labeling systems

If a source uses a labeling or numbering system other than page numbers, such as a script or poetry, precede the citation with said label. When citing a poem, for instance, the parenthetical would begin with the word “line”, and then the line number or range. For example, the examination of William Blake’s poem “The Tyger” would be cited as such:

The speaker makes an ardent call for the exploration of the connection between the violence of nature and the divinity of creation. “In what distant deeps or skies. / Burnt the fire of thine eyes," they ask in reference to the tiger as they attempt to reconcile their intimidation with their relationship to creationism (lines 5-6).

Longer labels, such as chapters (ch.) and scenes (sc.), should be abbreviated.

In-text citations for print sources with no known author

When a source has no known author, use a shortened title of the work instead of an author name, following these guidelines.

Place the title in quotation marks if it's a short work (such as an article) or italicize it if it's a longer work (e.g. plays, books, television shows, entire Web sites) and provide a page number if it is available.

Titles longer than a standard noun phrase should be shortened into a noun phrase by excluding articles. For example, To the Lighthouse would be shortened to Lighthouse .

If the title cannot be easily shortened into a noun phrase, the title should be cut after the first clause, phrase, or punctuation:

In this example, since the reader does not know the author of the article, an abbreviated title appears in the parenthetical citation, and the full title of the article appears first at the left-hand margin of its respective entry on the Works Cited page. Thus, the writer includes the title in quotation marks as the signal phrase in the parenthetical citation in order to lead the reader directly to the source on the Works Cited page. The Works Cited entry appears as follows:

"The Impact of Global Warming in North America." Global Warming: Early Signs . 1999. www.climatehotmap.org/. Accessed 23 Mar. 2009.

If the title of the work begins with a quotation mark, such as a title that refers to another work, that quote or quoted title can be used as the shortened title. The single quotation marks must be included in the parenthetical, rather than the double quotation.

Parenthetical citations and Works Cited pages, used in conjunction, allow readers to know which sources you consulted in writing your essay, so that they can either verify your interpretation of the sources or use them in their own scholarly work.

Author-page citation for classic and literary works with multiple editions

Page numbers are always required, but additional citation information can help literary scholars, who may have a different edition of a classic work, like Marx and Engels's  The Communist Manifesto . In such cases, give the page number of your edition (making sure the edition is listed in your Works Cited page, of course) followed by a semicolon, and then the appropriate abbreviations for volume (vol.), book (bk.), part (pt.), chapter (ch.), section (sec.), or paragraph (par.). For example:

Author-page citation for works in an anthology, periodical, or collection

When you cite a work that appears inside a larger source (for instance, an article in a periodical or an essay in a collection), cite the author of the  internal source (i.e., the article or essay). For example, to cite Albert Einstein's article "A Brief Outline of the Theory of Relativity," which was published in  Nature  in 1921, you might write something like this:

See also our page on documenting periodicals in the Works Cited .

Citing authors with same last names

Sometimes more information is necessary to identify the source from which a quotation is taken. For instance, if two or more authors have the same last name, provide both authors' first initials (or even the authors' full name if different authors share initials) in your citation. For example:

Citing a work by multiple authors

For a source with two authors, list the authors’ last names in the text or in the parenthetical citation:

Corresponding Works Cited entry:

Best, David, and Sharon Marcus. “Surface Reading: An Introduction.” Representations , vol. 108, no. 1, Fall 2009, pp. 1-21. JSTOR, doi:10.1525/rep.2009.108.1.1

For a source with three or more authors, list only the first author’s last name, and replace the additional names with et al.

Franck, Caroline, et al. “Agricultural Subsidies and the American Obesity Epidemic.” American Journal of Preventative Medicine , vol. 45, no. 3, Sept. 2013, pp. 327-333.

Citing multiple works by the same author

If you cite more than one work by an author, include a shortened title for the particular work from which you are quoting to distinguish it from the others. Put short titles of books in italics and short titles of articles in quotation marks.

Citing two articles by the same author :

Citing two books by the same author :

Additionally, if the author's name is not mentioned in the sentence, format your citation with the author's name followed by a comma, followed by a shortened title of the work, and, when appropriate, the page number(s):

Citing multivolume works

If you cite from different volumes of a multivolume work, always include the volume number followed by a colon. Put a space after the colon, then provide the page number(s). (If you only cite from one volume, provide only the page number in parentheses.)

Citing the Bible

In your first parenthetical citation, you want to make clear which Bible you're using (and underline or italicize the title), as each version varies in its translation, followed by book (do not italicize or underline), chapter, and verse. For example:

If future references employ the same edition of the Bible you’re using, list only the book, chapter, and verse in the parenthetical citation:

John of Patmos echoes this passage when describing his vision (Rev. 4.6-8).

Citing indirect sources

Sometimes you may have to use an indirect source. An indirect source is a source cited within another source. For such indirect quotations, use "qtd. in" to indicate the source you actually consulted. For example:

Note that, in most cases, a responsible researcher will attempt to find the original source, rather than citing an indirect source.

Citing transcripts, plays, or screenplays

Sources that take the form of a dialogue involving two or more participants have special guidelines for their quotation and citation. Each line of dialogue should begin with the speaker's name written in all capitals and indented half an inch. A period follows the name (e.g., JAMES.) . After the period, write the dialogue. Each successive line after the first should receive an additional indentation. When another person begins speaking, start a new line with that person's name indented only half an inch. Repeat this pattern each time the speaker changes. You can include stage directions in the quote if they appear in the original source.

Conclude with a parenthetical that explains where to find the excerpt in the source. Usually, the author and title of the source can be given in a signal phrase before quoting the excerpt, so the concluding parenthetical will often just contain location information like page numbers or act/scene indicators.

Here is an example from O'Neill's  The Iceman Cometh.

WILLIE. (Pleadingly) Give me a drink, Rocky. Harry said it was all right. God, I need a drink.

ROCKY. Den grab it. It's right under your nose.

WILLIE. (Avidly) Thanks. (He takes the bottle with both twitching hands and tilts it to his lips and gulps down the whiskey in big swallows.) (1.1)

Citing non-print or sources from the Internet

With more and more scholarly work published on the Internet, you may have to cite sources you found in digital environments. While many sources on the Internet should not be used for scholarly work (reference the OWL's  Evaluating Sources of Information  resource), some Web sources are perfectly acceptable for research. When creating in-text citations for electronic, film, or Internet sources, remember that your citation must reference the source on your Works Cited page.

Sometimes writers are confused with how to craft parenthetical citations for electronic sources because of the absence of page numbers. However, these sorts of entries often do not require a page number in the parenthetical citation. For electronic and Internet sources, follow the following guidelines:

• Include in the text the first item that appears in the Work Cited entry that corresponds to the citation (e.g. author name, article name, website name, film name).
• Do not provide paragraph numbers or page numbers based on your Web browser’s print preview function.
• Unless you must list the Web site name in the signal phrase in order to get the reader to the appropriate entry, do not include URLs in-text. Only provide partial URLs such as when the name of the site includes, for example, a domain name, like  CNN.com  or  Forbes.com,  as opposed to writing out http://www.cnn.com or http://www.forbes.com.

Miscellaneous non-print sources

Two types of non-print sources you may encounter are films and lectures/presentations:

In the two examples above “Herzog” (a film’s director) and “Yates” (a presentor) lead the reader to the first item in each citation’s respective entry on the Works Cited page:

Herzog, Werner, dir. Fitzcarraldo . Perf. Klaus Kinski. Filmverlag der Autoren, 1982.

Yates, Jane. "Invention in Rhetoric and Composition." Gaps Addressed: Future Work in Rhetoric and Composition, CCCC, Palmer House Hilton, 2002. Address.

Electronic sources

Electronic sources may include web pages and online news or magazine articles:

In the first example (an online magazine article), the writer has chosen not to include the author name in-text; however, two entries from the same author appear in the Works Cited. Thus, the writer includes both the author’s last name and the article title in the parenthetical citation in order to lead the reader to the appropriate entry on the Works Cited page (see below).

In the second example (a web page), a parenthetical citation is not necessary because the page does not list an author, and the title of the article, “MLA Formatting and Style Guide,” is used as a signal phrase within the sentence. If the title of the article was not named in the sentence, an abbreviated version would appear in a parenthetical citation at the end of the sentence. Both corresponding Works Cited entries are as follows:

Taylor, Rumsey. "Fitzcarraldo." Slant , 13 Jun. 2003, www.slantmagazine.com/film/review/fitzcarraldo/. Accessed 29 Sep. 2009. 

"MLA Formatting and Style Guide." The Purdue OWL , 2 Aug. 2016, owl.english.purdue.edu/owl/resource/747/01/. Accessed 2 April 2018.

Multiple citations

To cite multiple sources in the same parenthetical reference, separate the citations by a semi-colon:

Time-based media sources

When creating in-text citations for media that has a runtime, such as a movie or podcast, include the range of hours, minutes and seconds you plan to reference. For example: (00:02:15-00:02:35).

When a citation is not needed

Common sense and ethics should determine your need for documenting sources. You do not need to give sources for familiar proverbs, well-known quotations, or common knowledge (For example, it is expected that U.S. citizens know that George Washington was the first President.). Remember that citing sources is a rhetorical task, and, as such, can vary based on your audience. If you’re writing for an expert audience of a scholarly journal, for example, you may need to deal with expectations of what constitutes “common knowledge” that differ from common norms.

Other Sources

The MLA Handbook describes how to cite many different kinds of authors and content creators. However, you may occasionally encounter a source or author category that the handbook does not describe, making the best way to proceed can be unclear.

In these cases, it's typically acceptable to apply the general principles of MLA citation to the new kind of source in a way that's consistent and sensible. A good way to do this is to simply use the standard MLA directions for a type of source that resembles the source you want to cite.

You may also want to investigate whether a third-party organization has provided directions for how to cite this kind of source. For example, Norquest College provides guidelines for citing Indigenous Elders and Knowledge Keepers⁠ —an author category that does not appear in the MLA Handbook . In cases like this, however, it's a good idea to ask your instructor or supervisor whether using third-party citation guidelines might present problems.

In-Text Citations: An Overview

In-text citations are brief, unobtrusive references that direct readers to the works-cited-list entries for the sources you consulted and, where relevant, to the location in the source being cited.

An in-text citation begins with the shortest piece of information that di­rects your reader to the entry in the works-cited list. Thus, it begins with what ever comes first in the entry: the author’s name or the title (or descrip­tion) of the work. The citation can appear in your prose or in parentheses.

Citation in prose  Naomi Baron broke new ground on the subject. Parenthetical citation At least one researcher has broken new ground on the subject (Baron). Work cited Baron, Naomi S. “Redefining Reading: The Impact of Digital Communication Media.” PMLA , vol. 128, no. 1, Jan. 2013, pp. 193–200. 

When relevant, an in-text citation also has a second component: if a specific part of a work is quoted or paraphrased and the work includes a page number, line number, time stamp, or other way to point readers to the place in the work where the information can be found, that location marker must be included in parentheses.

Parenthetical citation According to Naomi Baron, reading is “just half of literacy. The other half is writing” (194).

The author or title can also appear alongside the page number or other loca­tion marker in parentheses.

Parenthetical citation Reading is “just half of literacy. The other half is writing” (Baron 194).

All in-text references should be concise. Avoid, for instance, providing the author’s name or title of a work in both your prose and parentheses.

Citation (incorrect) According to Naomi Baron, reading is “just half of literacy. The other half is writing” (Baron 194). Citation (correct) According to Naomi Baron, reading is “just half of literacy. The other half is writing” (194).

For more on what to include in an in-text citation and how to style it, see sections 6.3–6.30 of the ninth edition of the MLA Handbook ).

55 Comments

Brandi unruh 10 april 2021 at 11:04 am.

Hello! I am a high school English teacher trying to answer a question that came up during our research unit. I can’t seem to find a definitive answer online. When using a shortened title in an in-text citation, does an ellipsis need to be included? For example, if the title was “The Problem of Poverty in America: A Historical and Cultural Analysis”, would the in-text citation be (“The Problem of Poverty in America...”) or (“The Problem of Poverty in America”)? Thank you for your time and expertise!

Your e-mail address will not be published

Laura Kiernan 12 April 2021 AT 11:04 AM

No, an ellipsis would not be used in an in-text citation. We provide extensive guidance on shortening titles in 6.10 of the new ninth edition of the MLA Handbook .

angel 10 May 2021 AT 02:05 PM

hii How to write an in text citation of an entry from encyclopedia which has an editor but no separate authors for each entry ?

William Feeler 11 May 2021 AT 01:05 PM

I see no mention of paragraph numbers for unpaginated prose or sections/lines for drama. are these practices gone?

Laura Kiernan 18 May 2021 AT 01:05 PM

This post provides a general overview of our approach to in-text citations. The complete guidelines appear in sections 6.1–6.30 of the ninth edition of the MLA Handbook .

Vonceil Park 11 May 2021 AT 01:05 PM

Dear MLA Staff, A professor at my College demands students to provide paragraph number in the in-text citation for online articles that have no page number nor paragraph number. Do we just count the paragraph number and put them in the parenthesis, for example: (para. 3)?

Laura Kiernan 18 May 2021 AT 12:05 PM

Thank you for your question. Your approach to modifying our style in accordance with your professor's instructions works, but we would suggest confirming that styling with your professor.

Arathi Babu 17 May 2021 AT 08:05 AM

How to write an in text citation of an unsigned entry from a reference work?

Laura Kiernan 08 June 2021 AT 11:06 AM

If the entry was in a print work, the in-text citation would include the entry’s title or a shortened version of the entry’s title and the page number of the quotation. If the entry was in a reference work without page numbers, the in-text citation should just contain the title or shortened title of the entry.

Sethu 17 May 2021 AT 02:05 PM

For example: Can I give an in-text citation like the following: Shakespeare, in his work Hamlet, quotes: "To be or not to be" (7).

For citing commonly studied verse works, see 6.22 in the ninth edition of the MLA Handbook .

Trinity Klein 21 May 2021 AT 11:05 AM

Can you please help with proper in-text citation placement for an embedded quotation? Does the citation come immediately after the quotation or at the very end of the sentence? For example, is this correct: He asks her to take him home “in the voice of a child afraid of the dark” which comes as a shock to Scout because he has so long held a bold and rebellious reputation (372). Or should the (372) come immediately after ...dark"...? Thank you!

For more information about the placement of a parenthetical citations, see 6.43 in the ninth edition of the MLA Handbook .

Karima 30 May 2021 AT 05:05 PM

Dear MLA staff, 1) In case i am quoting from multiple sources by the same author, am i required to introduce again the source i am quoting from in the beginning of my sentence? (Quotes are used in multiple paragraphs)

For guidance on citing multiple sources by the same author, see 6.8 in the ninth edition of the MLA Handbook .

Yves 23 June 2021 AT 06:06 PM

Hello, is there a specific rule about how to format a range of page numbers in the parenthetical citation? For example, could (Eden 44-45) be written as (Eden 44-5), or is only one example correct?

Laura Kiernan 24 September 2021 AT 02:09 PM

For information about styling number ranges, see section 2.139 of the ninth edition of the MLA Handbook .

Faliravo 11 August 2021 AT 05:08 AM

Good morning MLA team, My professor insists that I include the year of publication for in-text citations. Is it going to be okay if I insert the year between the author and the page number?

Thank you very much for your consideration.

Laura Kiernan 24 September 2021 AT 01:09 PM

Your approach to modifying our style in accordance with your professor’s instructions works, but we would suggest confirming that styling with your professor.

Pauline 14 September 2021 AT 11:09 PM

How do I cite an entire work. For example, if I want to say Toni Morrison's the "Bluest Eye" has been used as a textbook for many English literature classes, I suppose I shouldn't put any page number in the parenthetical citation. But I can't find any MLA references on this.

See section 4.14 of the ninth edition of the MLA Handbook .

myron glassenberg 04 February 2022 AT 01:02 PM

if source is the whole book, how do I cite in text and in works cited pages. e.g. freud (no page number) Freud , ( 1892) The Pleasure Principle.

Rita Rozzi 20 September 2023 AT 07:09 PM

There is no section 4.14 in the ninth edition. Do you have any updated information? Thank you.

Laura Kiernan 21 September 2023 AT 03:09 PM

Section 4.14, which is titled "Passing Mentions," can be found in chapter 4 of the ninth edition of the handbook.

Lauren McFall 13 October 2021 AT 02:10 PM

Students often refer to the same source consecutively across more than one sentence. I'm having a hard time finding information about the preferred approach according to the MLA. As a parallel, APA makes a specific recommendation - "cite the source in the first sentence in which it is relevant and do not repeat the citation in subsequent sentences as long as the source remains clear and unchanged" https://apastyle.apa.org/style-grammar-guidelines/citations/appropriate-citation

Laura Kiernan 20 October 2021 AT 04:10 PM

See 6.45 of the ninth edition of the MLA Handbook .

Ruth Schafer 01 December 2022 AT 07:12 PM

6.45 out of the MLA Handbook's ninth edition does not provide an example of how to cite a multi-sentence paraphrase when using an unpaginated source. Can you give an example of how to cite a multi-sentence paraphrase where the source does not have published page numbering?

Should I introduce the source in my prose and then again at the end of the multi-sentence paraphrase in parentheses when I have finished citing the paraphrase? Example: John Smith from Smith Architecture explains that crawl space foundations are...blah blah blah. These foundations are most commonly used in midwestern constructions where the frost line is...blah, blah, blah. Keep writing the paraphrase and then at the end of the final sentence instead of a page citation write the author's last name (Smith). This way if you switch to a different source, at least the reader knows that you have finished with the Smith source and have moved on to your own commentary or another source's information. Usually, I'd use a page citation at the end of the paraphrase, but when dealing with a source that does not have page numbering, I'm unsure what to do.

Lizzie 18 October 2021 AT 10:10 PM

If I only use textual evidence from the novel I'm examining, do I need to include the authors name with each in text citation? There are no other works cited, so it seems redundant/clutter-y to me

Kayden 29 October 2021 AT 05:10 PM

If I'm trying to cite multiple paragraphs from the same source would it be correct to say (par. 3 and 13) or should it be (par. 3, 13) and is it different if they are next to each other too like (par. 6-7) or (par. 6 and 7).

Laura Kiernan 04 November 2021 AT 11:11 AM

See sections 6.18–6.20 of the ninth edition of the MLA Handbook .

Rachel 17 November 2021 AT 01:11 PM

When citing from an online source without pagination, if you include the author's name in the introduction to the quote, do you need to include anything in parentheses like the article title?

Laura Kiernan 22 November 2021 AT 12:11 PM

See section 6.26 of the ninth edition of the MLA Handbook .

July 25 November 2021 AT 05:11 PM

When quoting an online source (e.g. a website), do I have to indicate the fact that it's an online source in the in-text-citations as in (Name [online]) or is the author's name enough?

Thank you in advance for your answer.

Laura Kiernan 29 November 2021 AT 10:11 AM

According to MLA style, an in-text citation for an online work should not note that the work is online.

Pinkie 19 March 2022 AT 08:03 PM

If I'm writing a response paper, and I need to summarize the whole article to introduce it, then should I use in-text citation?

Laura Kiernan 25 March 2022 AT 01:03 PM

For guidance on paraphrasing, see sections 4.5–4.8 of the ninth edition of the MLA Handbook .

Kay 09 April 2022 AT 06:04 PM

Hi, am I supposed to include the DOI when one is available in the citation? If I cite the print version of a journal article that has a DOI, still include the DOI in the citation? Thank you!

Laura Kiernan 11 April 2022 AT 11:04 AM

Thank you for your questions. For guidance on including a DOI in your works-cited-list entry, see sections 5.84 and 5.93 in the ninth edition of the MLA Handbook .

Mike 16 April 2022 AT 05:04 PM

Website in-text Citation...

When I'm writing an in-text citation for a website, I'm seeing all manner of different things to include. Do I need to add the author name and year of publishing for the article?\ Do I just need the website name? I'm not really understanding what I need to add or obtain for such a citation within the text I'm writing.

I'm writing a book on my life, and I'm quoting a particular webpage to show one particular angle of an argument I'm making, and, of course, it's not common knowledge, so I want to make sure that I follow all the rules for this kind of thing, so I don't get in trouble with the author(s) of the sources I have quoted from...

Laura Kiernan 18 April 2022 AT 02:04 PM

Thank you for your questions about MLA style. For guidance on in-text citations for web pages, see section 6.26 of the ninth edition of the MLA Handbook .

Cynthia 21 May 2022 AT 10:05 PM

When you're doing an In-text citations do you put the quotations over the chapter title and then quotations over what you get from the text or do you italicize the title?

Laura Kiernan 25 May 2022 AT 03:05 PM

Thank you for your question. For guidance on how to style chapter titles, see 2.109 of the ninth edition of the MLA Handbook .

Napatsi 15 August 2022 AT 07:08 PM

I'm trying to find how to put in the in-text citation for a UN declaration article but can only find the "Resolutions of International Governing Bodies" on page 446 of the 9th edition but not how to out it in without an author.

Kim 27 September 2022 AT 12:09 PM

I'm quoting a passage from an unpublished manuscript, and it is not the only work I'm citing by the author, but the only one without a year. So using "Smith 1995, 82" is not possible. What would an in-text citation for this case look like?

Jen 17 November 2022 AT 08:11 PM

How do I cite a news cast for in-text citation like ABC News?

Samantha 04 December 2022 AT 05:12 PM

Hi, For MLA format, should a quote where you need to de-capitalize the first letter be written as "you want" or "(y)ou want". Thanks!

Laura Kiernan 07 December 2022 AT 01:12 PM

Thank you for your question. For guidance on how to indicate that you have lowercased the first letter of a quotation, see 6.56 of the ninth edition of the MLA Handbook .

Maria Albeti 07 February 2023 AT 01:02 PM

Stewart, David W. Focus groups. In: Frey, B.B. (ed.) The SAGE Encyclopedia of Educational Research, Measurement, and Evaluation, vol. 2, pp. 687–692. Thousand Oaks: Sage Publications 2018 In this case, how is the correct form to write, because the article is IN the the book?

Eros Karadzhov 15 February 2023 AT 02:02 PM

If we have a sentence that is a statement, but at the end we quote a question, which punctuation mark do we keep, the question mark or the period; maybe both? Example: (1) The author ends his poem with the following question on purpose: "Or does it explode?" (Hughes 11). (2) The author ends his poem with the following question on purpose: "Or does it explode" (Hughes 11)?

Which would be correct, or maybe both are wrong?

Thank you in advance!

Laura Kiernan 16 February 2023 AT 03:02 PM

Thank you for your question. For guidance on quotations ending in a question mark, see section 6.53 of the ninth edition of the MLA Handbook .

Anonymous 08 March 2023 AT 05:03 PM

What about online articles with no known author or multiple authors? What should the in-text citation look like?

Maria 25 March 2023 AT 04:03 PM

Please settle a dispute with my colleagues. I encourage composition students to avoid listing the title of journal articles within the essay unless it is especially relevant because it clutters their arguments. I came to this conclusion from my interpretation of this statement from MLA: "All in-text references should be concise. Avoid, for instance, providing the author’s name or title of a work in both your prose and parentheses." Could someone please provide an answer or further clarification?

Erika Suffern 30 March 2023 AT 04:03 PM

You are right to identify a principle of concision in our guidelines. That said, it is not wrong to mention a title in prose, but it should be done, as you note, when relevant–not as a de rigeur practice or for “filler.” As Eric Hayot notes in The Elements of Academic Style: Writing for the Humanities (Columbia UP, 2014), “giving the title” in prose “suggests fuller forthcoming treatment” (159). Another reason for including the title in prose might be to call attention to something about it. Many writers who do mention a title in prose fear having an incomplete citation and are tempted also to include the title in a parenthetical reference, which is unnecessary.

Jay 29 April 2023 AT 12:04 AM

How do I in-text cite a direct quote from the introduction of an ebook with no page numbers? Would I write (Author "Introduction") or just write (Author)?

Kiara 11 February 2024 AT 03:02 PM

Hello! I am a university student who is currently creating works cited entries and in-text citations for a reflection essay. How do I properly cite professor and peer comments?

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In-text citations are inserted in the body of your research paper to briefly document the source of your information. 

• In-text citations in MLA style follow the general format of author's last name followed by a page number enclosed in parentheses. Here is an example: "Here's a direct quote" (Smith 8).
• If the author's name is not given, use the first word (or words) of the title. Follow the same formatting that is used in the works-cited list, such as quotation marks. Here is an example: This is a paraphrase ("Trouble" 22).
• If the source does not have page numbers (for example, some online articles, websites and e-books), only include the author's name for the in-text citation. Do not estimate or make up page numbers.  
• In-text citations point the reader to the works-cited list, which is located at the end of your paper, for more complete bibliographic information.

Repeated Use of Sources

If you use information from a single source more than once in succession (i.e., no other sources referred to in between), you can use a simplified in-text citation. Here is an example:

Cell biology is an area of science that focuses on the structure and function of cells (Smith 15). It revolves around the idea that the cell is a "fundamental unit of life" (17).

  Note: If using this simplified in-text citation creates ambiguity regarding the source being referred to, use the full in-text citation format.

In-Text Citation Formatting and Examples

Format:  (Author's Last Name Page Number)

Example: (Hunt 358)

Two Authors

Format:  (Author's Last Name and Author's Last Name Page Number)

Example: (Case and Daristotle 57)

Three or More Authors

Format:   (Author's Last Name et al. Page Number)

Example: (Case et al. 57)

Unknown Author

Where you would normally put the author's last name, instead use the first one, two, or three words from the title. Do not use  initial articles such as "A", "An" or "The". Provide enough words to clarify which sources from your works-cited list that you are referencing. 

Follow the formatting of the title. For example, if the title in the works-cited list is in italics, italicize the words from the title in the in-text citation, and if the title in the works-cited list is in quotation marks, put quotation marks around the words from the title in the in-text citation.

Format: (Title Page Number)

Examples : 

( Cell Biology 12)

("Nursing" 12)

Multiple Sources

To cite more than one source when you are paraphrasing, separate the in-text citations with a semi-colon.

Format: (Author's Last Name Page Number; Author's Last Name Page Number).

(Smith 42; Bennett 71). 

( It Takes Two ; Brock 43).

 Note: In MLA style, the sources within the in-text citation do not need to be in alphabetical order.

Works Quoted in Another Source

Sometimes an author of a book, article or website will mention another person's work by using a quotation or paraphrased idea from that source. (This may be a secondary source.) For example, the Kirkey article you are reading includes a quotation by Smith that you would like to include in your essay. The basic rule is that in both your Works-Cited List and in-text citation you will still cite Kirkey. Kirkey will appear in your Works Cited list – NOT Smith. Add the words "qtd. in" to your in-text citation.

Examples of in-text citations:

According to a study by Smith (qtd. in Kirkey) 42% of doctors would refuse to perform legal euthanasia.

Smith (qtd. in Kirkey) states that “even if euthanasia was legal, 42% of doctors would be against this method of assisted dying” (A.10).

Example of Works Cited List citation:

Kirkey, Susan. "Euthanasia."   The Montreal Gazette , 9 Feb. 2013, p. A.10. Canadian Newsstand Major Dailies.

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Home / Guides / Citation Guides / MLA Format / How to Cite an Essay in MLA

How to Cite an Essay in MLA

The guidelines for citing an essay in MLA format are similar to those for citing a chapter in a book. Include the author of the essay, the title of the essay, the name of the collection if the essay belongs to one, the editor of the collection or other contributors, the publication information, and the page number(s).

Citing an Essay

Mla essay citation structure.

Last, First M. “Essay Title.” Collection Title, edited by First M. Last, Publisher, year published, page numbers. Website Title , URL (if applicable).

MLA Essay Citation Example

Gupta, Sanjay. “Balancing and Checking.” Essays on Modern Democracy, edited by Bob Towsky, Brook Stone Publishers, 1996, pp. 36-48. Essay Database, www . databaseforessays.org/modern/modern-democracy.

MLA Essay In-text Citation Structure

(Last Name Page #)

MLA Essay In-text Citation Example

Click here to cite an essay via an EasyBib citation form.

MLA Formatting Guide

MLA Formatting

• Annotated Bibliography
• Bibliography
• Block Quotes
• et al Usage
• In-text Citations
• Paraphrasing
• Page Numbers
• Sample Paper
• Works Cited
• MLA 8 Updates
• MLA 9 Updates
• View MLA Guide

Citation Examples

• Book Chapter
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• Website (no author)
• View all MLA Examples

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To cite your sources in an essay in MLA style, you need to have basic information including the author’s name(s), chapter title, book title, editor(s), publication year, publisher, and page numbers. The templates for in-text citations and a works-cited-list entry for essay sources and some examples are given below:

In-text citation template and example:

For citations in prose, use the first name and surname of the author on the first occurrence. For subsequent citations, use only the surname(s). In parenthetical citations, always use only the surname of the author(s).

Citation in prose:

First mention: Annette Wheeler Cafarelli

Subsequent occurrences: Wheeler Cafarelli

Parenthetical:

….(Wheeler Cafarelli).

Works-cited-list entry template and example:

The title of the chapter is enclosed in double quotation marks and uses title case. The book or collection title is given in italics and uses title case.

Surname, First Name. “Title of the Chapter.” Title of the Book , edited by Editor(s) Name, Publisher, Publication Year, page range.

Cafarelli, Annette Wheeler. “Rousseau and British Romanticism: Women and British Romanticism.” Cultural Interactions in the Romantic Age: Critical Essays in Comparative Literature , edited by Gregory Maertz. State U of New York P, 1998, pp. 125–56.

To cite an essay in MLA style, you need to have basic information including the author(s), the essay title, the book title, editor(s), publication year, publisher, and page numbers. The templates for citations in prose, parenthetical citations, and works-cited-list entries for an essay by multiple authors, and some examples, are given below:

For citations in prose, use the first name and surname of the author (e.g., Mary Strine).

For sources with two authors, use both full author names in prose (e.g., Mary Strine and Beth Radick).

For sources with three or more authors, use the first name and surname of the first author followed by “and others” or “and colleagues” (e.g., Mary Strine and others). In subsequent citations, use only the surname of the first author followed by “and others” or “and colleagues” (e.g., Strine and others).

In parenthetical citations, use only the author’s surname. For sources with two authors, use two surnames (e.g., Strine and Radick). For sources with three or more author names, use the first author’s surname followed by “et al.”

First mention: Mary Strine…

Subsequent mention: Strine…

First mention: Mary Strine and Beth Radick…

Subsequent mention: Strine and Radick…

First mention: Mary Strine and colleagues …. or Mary Strine and others

Subsequent occurrences: Strine and colleagues …. or Strine and others

…. (Strine).

….(Strine and Radick).

….(Strine et al.).

The title of the essay is enclosed in double quotation marks and uses title case. The book or collection title is given in italics and uses title case.

Surname, First Name, et al. “Title of the Essay.” Title of the Book , edited by Editor(s) Name, Publisher, Publication Year, page range.

Strine, Mary M., et al. “Research in Interpretation and Performance Studies: Trends, Issues, Priorities.” Speech Communication: Essays to Commemorate the 75th Anniversary of the Speech Communication Association , edited by Gerald M. Phillips and Julia T. Wood, Southern Illinois UP, 1990, pp. 181–204.

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Essay Writing: In-Text Citations

• Essay Writing Basics
• Purdue OWL Page on Writing Your Thesis This link opens in a new window
• Paragraphs and Transitions
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• Formatting Your References Page
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• Common Grammatical and Mechanical Errors
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• Structuring the 5-Paragraph Essay

In-text Citations

What are In-Text Citations?

You must cite (give credit) all information sources used in your essay or research paper whenever and wherever you use them.

When citing sources in the text of your paper, you must list:

● The author’s last name

● The year  the information was published.

Types of In-Text Citations: Narrative vs Parenthetical

A  narrative citation gives the author's name as part of the sentence .

• Example of a Narrative Citation: According to Edwards (2017) , a lthough Smith and Carlos's protest at the 1968 Olympics initially drew widespread criticism, it also led to fundamental reforms in the organizational structure of American amateur athletics.

A  parenthetical citation puts the source information in parentheses—first or last—but does not include it in  the narrative  flow.

• Example of a Parenthetical Citation:  Although Tommie Smith and John Carlos paid a heavy price in the immediate aftermath of the protests, they were later vindicated by society at large (Edwards, 2017) .

Full citation for this source (this belongs on the Reference Page of your research paper or essay):

Edwards, H. (2017).  The Revolt of the Black Athlete: 50th Anniversary Edition.  University of Illinois Press.

Sample In-text Citations

Note: This example is a  direct quote. It is an exact quotation directly from the text of the article. All direct quotes should appear in quotation marks: "...."

Try keeping direct quotes to a minimum in your writing. You need to show your understanding of the source material by being able to paraphrase or summarize it. 

List the author’s last name only (no initials) and the year the information was published, like this:

(Dodge, 2008 ). ( Author , Date).

IF you use a direct quote, add the page number to your citation, like this: 

( Dodge , 2008 , p. 125 ).

( Author , Date , page number )

What information should I cite in my paper/essay?

Credit these sources when you mention their information in any way: direct quotation, paraphrase, or summarize.

What should you credit?

Any information that you learned from another source, including:

● statistics

EXCEPTION: Information that is common knowledge: e.g., The Bronx is a borough of New York City.

Quick Sheet: APA 7 Citations

Quick help with apa 7 citations.

• Quick Sheet - Citing Journal Articles, Websites & Videos, and Creating In-Text Citations A quick guide to the most frequently-used types of APA 7 citations.

In-text Citation Tutorial

• Formatting In-text Citations, Full Citations, and Block Quotes In APA 7 Style This presentation will help you understand when, why, and how to use in-text citations in your APA style paper.

Download the In-text Citations presentation  (above)  for an in-depth look at how to correctly cite your sources in the text of your paper.

SIgnal Phrase Activity

Paraphrasing activity from the excelsior owl, in-text citation quiz.

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MLA In-text Citations and Sample Essay 9th Edition

Listing your sources at the end of your essay in the Works Cited is only the first step in complete and effective documentation. Proper citation of sources is a two-part process . You must also cite, in the body of your essay, the source your paraphrased information or where directly quoted material came from. These citations within the essay are called in-text citations . You must cite all quoted, paraphrased, or summarized words, ideas, and facts from sources. Without in-text citations, you are in danger of plagiarism , even if you have listed your sources at the end of the essay. In-text citations point the reader to the sources’ information in the works cited page, so the in-text citation should be the first item listed in the source’s citation on the works cited page, which is usually the author’s last name (or the title if there is no author) and the page number, if provided.

Two Ways to Cite Your Sources In-text

Parenthetical citation.

Cite your source in parentheses at the end of quoted or paraphrased material.

Example with a page number: In regards to paraphrasing, "It is important to remember to use in-text citations for your paraphrased information, as well as your directly quoted material" (Habib 7).

Example without a page number : Paraphrasing is "often the best choice because direct quotes should be reserved for source material that is especially well-written in style and/or clarity" (Ruiz).

Signal Phrase

Within the sentence, through the use of a "signal phrase" which signals to the reader the specific source the idea or quote came from. Include the page number(s) in parentheses at the end of the sentence, if provided.

Example with a page number: According to Habib, "It is important to remember to use in-text citations for your paraphrased information, as well as your directly quoted material" (7).

Example without a page number: According to Ruiz, paraphrasing is "often the best choice because direct quotes should be reserved for source material that is especially well-written in style and/or clarity."

*See our handout "Signal Phrases" for more examples and information on effective ways to use signal phrases for in-text citations.

Do you need to include a page number in your in-text citation?

Printed materials such as books, magazines, journals, or internet and digital sources with PDF files that show an actual printed page number need to have a page number in the citation.

Internet and digital sources with a continuously scrolling page without a page number do not need a page number in the citation.

Commonly used in-text citations in parentheses

Notes on Quotes

Block quotation format.

When using long quotations that are over four lines of prose or over three lines of poetry in length, you will need to use block quotation format. Block format is indented one inch from the margin (you can hit the "tab" button twice to move it one inch). Additionally, block quotes do not use quotation marks, and the parenthetical citation comes after the period of the last sentence. Please see the following sample essay for an example block quote.

Signal Phrase Examples and Ideas

Please see the following sample essay for different kinds of signal phrases and parenthetical in-text citations, which correspond with the sample Works Cited page at the end. The Writing Center also has a handout on signal phrases with many different verb options.

Learn more about the MLA Works Cited page by reviewing this handout .

For information on STLCC's academic integrity policy, check out this website .

• Plagiarism and grammar
• Citation guides

MLA Citation Generator

Don't let plagiarism errors spoil your paper, the complete guide to mla & citations, what you’ll find in this guide.

This page provides an in-depth overview of MLA format. It includes information related to MLA citations, plagiarism, proper formatting for in-text and regular citations, and examples of citations for many different types of sources.

Looking for APA? Check out the Citation Machine’s guide on APA format . We also have resources for Chicago citation style as well.

How to be a responsible researcher or scholar

Putting together a research project involves searching for information, disseminating and analyzing information, collecting information, and repurposing information. Being a responsible researcher requires keeping track of the sources that were used to help develop your research project, sharing the information you borrowed in an ethical way, and giving credit to the authors of the sources you used. Doing all of these things prevents plagiarism.

What is Plagiarism?

Plagiarism is the act of using others’ information without giving credit or acknowledging them. There are many examples of plagiarism. Completely copying another individual’s work without providing credit to the original author is a very blatant example of plagiarism. Plagiarism also occurs when another individual’s idea or concept is passed off as your own. Changing or modifying quotes, text, or any work of another individual is also plagiarism. Believe it or not, you can even plagiarize yourself! Reusing a project or paper from another class or time and saying that it’s new is plagiarism. One way to prevent plagiarism is to add citations in your project where appropriate.

What is a Citation?

A citation shows the reader of your project where you found your information. Citations are included in the body of a project when you add a quote to your project. Citations are also included in the body when you’re paraphrasing another individual’s information. These citations in the body of a research paper are called in-text citations. They are found directly next to the information that was borrowed and are very brief to avoid causing distraction while reading a project. These brief citations include the last name of the author and a page number. Scroll down for an in-depth explanation and examples of MLA in-text citations.

In-text citations provide us with a brief idea as to where you found your information, though they usually don't include the title and other components. Look on the last page of a research project to find complete citations.

Complete citations are found on what MLA calls a works-cited list, which is sometimes called an MLA bibliography. All sources that were used to develop a research project are found on the works-cited list. Complete citations are also created for any quotes or paraphrased information used in the text. Complete citations include the author’s name, the title, publisher, year published, page numbers, URLs, and a few other pieces of information.

Looking to create your citations in just a few clicks? Need an MLA format website or book citation? Visit Citation Machine.net! Our Citation Machine MLA generator, which is an MLA citation website, will create all of your citations in just a few clicks. Click here to see more styles .

Why Does it Matter?

Citing your sources is an extremely important component of your research project. It shows that you’re a responsible researcher and that you located appropriate and reputable sources that support your thesis or claim. In addition, if your work ends up being posted online or in print, there is a chance that others will use your research project in their own work!

Scroll down to find directions on how to create citations.

How the Modern Language Association Helps You Become a Responsible Researcher

What is mla format.

The Modern Language Association is an organization that was created to develop guidelines on everything language and literature related. They have guidelines on proper grammar usage and research paper layouts. In addition, they have English and foreign language committees, numerous books and journal publications, and an annual conference. They are not connected with this guide, but the information here reflects the association’s rules for formatting papers and citations.

What are citations?

The Modern Language Association is responsible for creating standards and guidelines on how to properly cite sources to prevent plagiarism. Their style is most often used when writing papers and citing sources in the liberal arts and humanities fields. “Liberal arts” is a broad term used to describe a range of subjects including the humanities, formal sciences such as mathematics and statistics, natural sciences such as biology and astronomy, and social sciences such as geography, economics, history, and others. The humanities focuses specifically on subjects related to languages, art, philosophy, religion, music, theater, literature, and ethics.

Believe it or not, there are thousands of other types of citation styles. While this citation style is most often used for the liberal arts and humanities fields, many other subjects, professors, and schools prefer citations and papers to be styled in MLA format.

What’s the difference between a bibliography and a works-cited list?

Great question. The two terms cause a lot of confusion and are consistently misused not only by students but educators as well! Let’s start with what the two words mean.

A bibliography displays the sources the writer used to gain background knowledge on the topic and also research it in-depth. Before starting a research project, you might read up on the topic in websites, books, and other sources. You might even dive a bit deeper to find more information elsewhere. All of these sources you used to help you learn about the topic would go in an MLA format bibliography. You might even include other sources that relate to the topic.

A works-cited list displays all of the sources that were mentioned in the writing of the actual paper or project. If a quote was taken from a source and placed into a research paper, then the full citation goes on the works-cited list.

Both the works-cited list and bibliography go at the end of a paper. Most teachers do not expect students to hand in both a bibliography AND a works-cited list. Teachers generally expect to see a works-cited list, but sometimes erroneously call it a bibliography. If you’re not sure what your teacher expects, a page in MLA bibliography format, a works-cited list, or both, ask for guidance.

Why do we use this MLA style?

These specific guidelines and standards for creating citations were developed for numerous reasons. When scholars and researchers in literature, language, and numerous other fields all cite their sources in the same manner, it makes it easier for readers to look at a citation and understand the different components of a source. By looking at an MLA citation, we can see who the author is, the title of the source, when it was published, and other identifiable pieces of information.

Imagine how difficult it would be to understand the various components of a source if we didn’t all follow the same guidelines! Not only would it make it difficult to understand the source that was used, but it would also make it difficult for readers to locate it themselves. This streamlined process aides us in understanding a researcher’s sources.

How is the new version different than previous versions?

This citation style has changed dramatically over the past couple of years. The MLA Handbook is currently in its 9th edition.

The new version expands upon standards previously set in the 8th edition of the MLA Handbook, including the core elements. The structure of citations remains the same, but some formatting guidance and terminology have changed.

• DOI numbers are now formatted as https://doi.org/xx.xxxx/xxx.xxxx.xxxx
• Seasons in publishing daters are lowercased: spring 2020
• The term “optional elements” is now “supplemental elements”
• “Narrative in-text citations” are called “citations in prose”

In addition, new information was added on the following:

• Hundreds of works-cited-list entries
• MLA formatting for papers
• Punctuation, spelling, and other mechanics of prose
• Chapter on inclusive language
• Notes (bibliographic and content)

For more information on MLA 9, click here .

A Deeper Look at Citations

What do they look like.

There are two types of citations. The first is a full, or complete, citation. These are found at the end of research projects. These citations are usually listed in alphabetical order by the author’s last names and include all of the information necessary for readers to be able to locate the source themselves.

Full citations are generally placed in this MLA citation format:

%%Last name of the author, First name of the author. “Source’s Title.” Container’s Title, roles and names of any other individuals who helped contribute to the source, the version of the source, any numbers associated with the source, the name of the publisher, the date the source was published, the location where individuals can find the source themselves (usually a DOI, URL, or page range).

There are times when additional information is added into the full citation.

Not sure how to transfer the information from your source into your citation? Confused about the term, “containers”? See below for information and complete explanations of each citation component.

The second type of citation, called an “in-text citation,” is included in the main part, or body, of a project when a researcher uses a quote or paraphrases information from another source. See the next section to find out how to create in-text citations.

What are in-text citations?

As stated above, in-text citations are included in the main part of a project when using a quote or paraphrasing a piece of information from another source. We include these types of citations in the body of a project for readers to quickly gain an idea as to where we found the information.

These in-text citations are found directly next to the quote or paraphrased information. They contain a small tidbit of the information found in the regular MLA citation. The regular, or complete, citation is located at the end of a project, on the works-cited list.

Here’s what a typical in-text citation looks like:

In the book The Joy Luck Club, the mother uses a vast amount of Chinese wisdom to explain the world and people’s temperaments. She states, “Each person is made of five elements…. Too much fire and you have a bad temper...too little wood and you bent too quickly...too much water and you flowed in too many directions” (Tan 31).

This specific in text citation, (Tan 31), is called an MLA parenthetical citation because the author’s name is in parentheses. It’s included so the reader sees that we are quoting something from page 31 in Tan’s book. The complete, regular citation isn’t included in the main part of the project because it would be too distracting for the reader. We want the reader to focus on our work and research, not get caught up on our sources.

Here’s another way to cite in the text:

In Tan’s novel The Joy Luck Club, the mother uses a vast amount of Chinese wisdom to explain the world and people’s temperaments. She states, “Each person is made of five elements... Too much fire and you have a bad temper... too little wood and you bent too quickly... too much water and you flowed in too many directions" (31).

If the reader would like to see the source’s full information, and possibly locate the source themselves, they can refer to the last part of the project to find the regular citation.

The regular citation, at the end of the project looks like this:

%%Tan, Amy. The Joy Luck Club. Penguin, 1989, p. 31.

Notice that the first word in the full citation (Tan) matches the “Tan” used in the body of the project. It’s important to have the first word of the full citation match the term used in the text. Why? It allows readers to easily find the full citation on the works-cited list.

If your direct quote or paraphrase comes from a source that does not have page numbers, it is acceptable to place a line number (use line or lines), paragraph number (use the abbreviation par. or pars.), sections (sec. or secs.), or chapters (ch. or chs.). Only use these other terms if they are actually labeled on the source. If it specifically says on the source, “Section 1,” for example, then it is acceptable to use “sec. 1” in the in-text citation.

If there are no numbers to help readers locate the exact point in the source, only include the author’s last name.

To determine how to create in-text citations for more than one author, no authors, or corporate authors, refer to the “Authors” section below.

More about quotations and how to cite a quote:

• Use quotes from outside sources to help illustrate and expand on your own points. The majority of your paper should be your own writing and ideas.
• Include the quote exactly as you found it. It is okay to use only certain words or phrases from the quote, but keep the words (spelling and capitalization) and punctuation the same.
• It is acceptable to break up a direct quote with your own writing.

Example from a movie:

Dorothy stated, "Toto," then looked up and took in her surroundings, "I’ve a feeling we’re not in Kansas anymore" ( Wizard of Oz ).

• The entire paper should be double-spaced, including quotes.
• If the quote is longer than four lines, it is necessary to make a block quote. Block quotes show the reader that they are about to read a lengthy amount of text from another source.
• Start the quote on the next line, half an inch from the left margin.
• Do not use any indents at the beginning of the block quote.
• Only use quotation marks if there are quotation marks present in the source.
• If there is more than one paragraph in the block quote, indent the beginning of the paragraphs after the first one an additional half an inch from the left margin.
• Add your in-text citation after the final period of the block quote. Do not add an additional period after the parenthetical citation.

While his parents sat there in surprise, Colton went onto say:

“Cause I could see you,” Colon said matter-of-factly. “I went up and out of my body and I was looking down and I could see the doctor working on my body. And I saw you and Mommy. You were in a little room by yourself, praying; and Mommy was in a different room, and she was praying and talking on the phone.” (Burpo xxi)

How to create a paraphrase:

As stated above, the majority of your paper should be your own writing and ideas. It’s acceptable to include quotes, but they shouldn’t crowd your paper. If you’re finding that you’re using too many quotes in your paper, consider adding paraphrases. When you reiterate a piece of information from an outside source in your own words, you create a paraphrase.

Here’s an example:

Readers discover in the very first sentence of Peter Pan that he doesn’t grow up (Barrie 1).

What paraphrases are:

• Recycled information in the paper writer’s own words and writing style.
• They’re still references! Include an in-text citation next to the paraphrased information.

What paraphrases are not:

• A copy and pasted sentence with a few words substituted for synonyms.

Confused about whether footnotes and endnotes should be used?

Footnotes and endnotes are completely acceptable to use in this style. Use a footnote or endnote if:

• Adding additional information will help the reader understand the content. This is called a content note .
• You need to cite numerous sources in one small section of your writing. Instead of clogging up a small paragraph with in-text citations (which could cause confusion for the reader), include a footnote or endnote. This is called a bibliographic note .

Keep in mind that whether you choose to include in-text citations or footnotes/endnotes, you need to also include a full reference on the MLA format works-cited list.

Content note example:

Even Maurice Sendak’s work (the mastermind behind Where the Wild Things Are and numerous other popular children’s picture books) can be found on the banned books list. It seems as though nobody is granted immunity. 1

• In the Night Kitchen ’s main character is nude on numerous pages. Problematic for most is not the nudity of the behind, but the frontal nudity.

Work Cited:

%%Sendak, Maurice. In The Night Kitchen. Harper Collins, 1996.

Bibliographic note example:

Dahl had a difficult childhood. Both his father and sister passed away when he was a toddler. He was then sent away by his mother to boarding school (de Castella). 1

• Numerous books, such as Matilda, James and the Giant Peach, and The BFG, all feature characters with absent or difficult parents.

MLA Works Cited:

Include 4 full citations for: de Castella’s article, Matilda, James and the Giant Peach, and The BFG .

Don’t forget to create full, or regular citations, and place them at the end of your project.

If you need help with in-text and parenthetical citations, CitationMachine.net can help. Our MLA citation generator is simple and easy to use!

Common Knowledge: What Is It and How Will It Affect My Writing?

Footnotes, endnotes, references, proper structuring. We know it’s a lot. Thankfully, you don’t have to include a reference for EVERY piece of information you add to your paper. You can forget about including a reference when you share a piece of common knowledge.

Common knowledge is information that most people know. For example, these are a few facts that are considered common knowledge:

• The Statue of Liberty is located in New York City
• Tokyo is the capital of Japan
• Romeo and Juliet is a play written by William Shakespeare
• English is the language most people speak in England
• An elephant is an animal

We could go on and on. When you include common knowledge in your paper, omit a reference. One less thing to worry about, right?

Before you start adding tons of common knowledge occurrences to your paper to ease the burden of creating references, we need to stop you right there. Remember, the goal of a research paper is to develop new information or knowledge. You’re expected to seek out information from outside sources and analyze and distribute the information from those sources to form new ideas. Using only common knowledge facts in your writing involves absolutely zero research. It’s okay to include some common knowledge facts here and there, but do not make it the core of your paper.

If you’re unsure if the fact you’re including is common knowledge or not, it doesn’t hurt to include a reference. There is no such thing as being overly responsible when it comes to writing and citing.

Wikipedia - Yay or Nay?

If you’re wondering whether it’s okay to use Wikipedia in your project, the answer is, it depends.

If Wikipedia is your go-to source for quick information on a topic, you’re not alone. Chances are, it’s one of the first websites to appear on your results page. It’s used by tons of people, it’s easily accessible, and it contains millions of concise articles. So, you’re probably wondering, “What’s the problem?”

The issue with Wikipedia is that it’s a user-generated site, meaning information is constantly added and modified by registered users. Who these users are and their expertise is somewhat of a mystery. The truth is anyone can register on the site and make changes to articles.

Knowing this makes some cringe, especially educators and librarians, since the validity of the information is questionable. However, some people argue that because Wikipedia is a user-generated site, the community of registered users serve as “watchdogs,” ensuring that information is valid. In addition, references are included at the bottom of each article and serve as proof of credibility. Furthermore, Wikipedia lets readers know when there’s a problem with an article. Warnings such as “this article needs clarification,” or “this article needs references to prove its validity” are shared with the reader, thus promoting transparency.

If you choose to reference a Wikipedia article in your research project, and your teacher or professor says it’s okay, then you must reference it in your project. You would treat it just as you would with any other web source.

However, you may want to instead consider locating the original source of the information. This should be fairly easy to do thanks to the references at the bottom of each article.

Specific Components of a Citation

This section explains each individual component of the citation, with examples for each section for full citations and in-text citations.

Name of the author

The author’s name is usually the first item listed in the MLA citation. Author names start with the last name, then a comma is added, and then the author’s first name (and middle name if applicable) is at the end. A period closes this information.

Here are two examples of how an author’s name can be listed in a full citation:

Twain, Mark.

Poe, Edgar Allan.

For in-text:

(Author’s Last name page number) or Author’s Last name... (page).

Wondering how to format the author’s name when there are two authors working jointly on a source? When there are two authors that work together on a source, the author names are placed in the order in which they appear on the source. Place their names in this format:

Author 1’s Last Name, First name, and Author 2’s First Name Last Name.

Here are two examples of how to cite two authors:

Clifton, Mark, and Frank Riley.

Paxton, Roberta J., and Michael Jacob Fox.

(Author 1’s Last name and Author 2’s Last name page number) or Author 1’s Last name and Author 2’s Last name... (page).

There are many times when three or more authors work together on a source. This often happens with journal articles, edited books, and textbooks.

To cite a source with three or more authors, place the information in this format:

Author 1’s Last name, First name, et al.

As you can see, only include the first author’s name. The other authors are accounted for by using “et al.” In Latin, et al. is translated to “and others.” If using the Citation Machine citation generator, this abbreviation is automatically added for you.

Here’s an example of a citation for three or more authors:

%%Warner, Ralph, et al. How to Buy a House in California. Edited by Alayna Schroeder, 12th ed., Nolo, 2009.

(Author 1’s Last name et al. page number)

Is there no author listed on your source? If so, exclude the author’s information from the citation and begin the citation with the title of the source.

For in-text: Use the title of the source in parentheses. Place the title in italics if the source stands alone. Books and films stand alone. If it’s part of a larger whole, such as a chapter in an edited book or an article on a website, place the title in quotation marks without italics.

( Back to the Future )

(“Citing And Writing”)

Other in-text structures:

Authors with the same last name in your paper? MLA essay format requires the use of first initials in-text in this scenario.

Ex: (J. Silver 45)

Are you citing more than one source by the same author? For example, two books by Ernest Hemingway? Include the title in-text.

Example: (Hemingway, For Whom The Bell Tolls 12).

Are you citing a film or song? Include a timestamp in the format of hours:minutes:seconds. ( Back to the Future 00:23:86)

Was the source found on social media, such as a tweet, Reddit, or Instagram post? If this is the case, in an MLA format paper, you are allowed to start the citation with the author’s handle, username, or screen name.

Here is an example of how to cite a tweet:

%%@CarlaHayden. “I’m so honored to talk about digital access at @UMBCHumanities. We want to share the @libraryofcongress collection.” Twitter , 13 Apr. 2017, 6:04 p.m., twitter.com/LibnOfCongress/status/852643691802091521.

While most citations begin with the name of the author, they do not necessarily have to. Quite often, sources are compiled by editors. Or, your source may be done by a performer or composer. If your project focuses on someone other than the author, it is acceptable to place that person’s name first in the citation. If you’re using the MLA works cited generator at Citation Machine.net, you can choose the individual’s role from a drop-down box.

For example, let’s say that in your research project, you focus on Leonardo DiCaprio’s performances as an actor. You’re quoting a line from the movie Titanic in your project, and you’re creating a complete citation for it in the works-cited list.

It is acceptable to show the reader that you’re focusing on Leonardo DiCaprio’s work by citing it like this in the MLA works-cited list:

%%DiCaprio, Leonardo, performer. Titanic . Directed by James Cameron. Paramount, 1997.

Notice that when citing an individual other than the author, place the individual’s role after their name. In this case, Leonardo DiCaprio is the performer.

This is often done with edited books, too. Place the editor’s name first (in reverse order), add a comma, and then add the word editor.

If you’re still confused about how to place the authors together in a citation, the tools at CitationMachine.net can help! Our website is easy to use and will create your citations in just a few clicks!

Titles and containers

The titles are written as they are found on the source and in title form, meaning the important words start with a capital.

Here’s an example of a properly written title:

Practical Digital Libraries: Books, Bytes, and Bucks.

Wondering whether to place your title in italics or quotation marks? It depends on whether the source sits by itself or not. If the source stands alone, meaning that it is an independent source, place the title in italics. If the title is part of a larger whole, place the title of the source in quotation marks and the source it is from in italics.

When citing full books, movies, websites, or albums in their entirety, these titles are written in italics.

However, when citing part of a source, such as an article on a website, a chapter in a book, a song on an album, or an article in a scholarly journal, the part is written with quotation marks and then the titles of the sources that they are found in are written in italics.

Here are some examples to help you understand how to format titles and their containers.

To cite Pink Floyd’s entire album, The Wall , cite it as:

%%Pink Floyd. The Wall. Columbia, 1979.

To cite one of the songs on Pink Floyd’s album in MLA formatting, cite it as:

%%Pink Floyd. “Another Brick in the Wall (Part I).” The Wall, Columbia, 1979, track 3.

To cite a fairy tale book in its entirety, cite it as:

%%Colfer, Chris. The Land of Stories. Little Brown, 2016.

To cite a specific story or chapter in the book, cite it as:

%%Colfer, Chris. “Little Red Riding Hood.” The Land of Stories, Little Brown, 2016, pp. 58-65.

More about containers

From the section above, you can see that titles can stand alone, or they can sit in a container. Many times, sources can sit in more than one container. Wondering how? When citing an article in a scholarly journal, the first container is the journal. The second container? It’s the database that the scholarly journal is found in. It is important to account for all containers, so readers are able to locate the exact source themselves.

When citing a television episode, the first container is the name of the show and the second container is the name of the service that it could be streaming on, such as Netflix .

If your source sits in more than one container, the information about the second container is found at the end of the citation.

Use the following format to cite your source with multiple containers :

%%Last name of the author, First name of the author. “Source’s Title.” Container’s Title, roles and names of any other individuals who helped contribute to the source, the version of the source, any numbers associated with the source, the name of the publisher, the date the source was published, the location where individuals can find the source themselves (usually a URL or page range). Title of Second Container, roles and names of any other contributors, the version of the second container, any numbers associated with the second container, the name of the second container’s publisher, the date the second container was published, location.

If the source has more than two containers, add on another full section at the end for each container.

Not all of the fields in the citation format above need to be included in your citation. In fact, many of these fields will most likely be omitted from your citations. Only include the elements that will help your readers locate the source themselves.

Here is an example of a citation for a scholarly journal article found in a database. This source has two containers: the journal itself is one container, and the site it sits on is the other.

%%Zanetti, Francois. “Curing with Machine: Medical Electricity in Eighteenth-Century Paris.” Technology and Culture, vol. 54, no. 3, July 2013, pp. 503-530. Project Muse, muse.jhu.edu/article/520280.

If you’re still confused about containers, the Citation Machine MLA cite generator can help! MLA citing is easier when using the tools at CitationMachine.net.

Other contributors

Many sources have people besides the author who contribute to the source. If your research project focuses on an additional individual besides the author, or you feel as though including other contributors will help the reader locate the source themselves, include their names in the citation.

To include another individual in the citation, after the title, place the role of the individual, the word “by,” and then their name in standard order.

If the name of the contributor comes after a period, capitalize the first letter in the role of the individual. If it comes after a comma, the first letter in the role of the individual is lowercased.

Here’s an example of a citation for a children’s book with the name of the illustrator included:

%%Rubin, Adam. Dragons Love Tacos. Illustrated by Daniel Salmieri, Penguin, 2012.

The names of editors, directors, performers, translators, illustrators, and narrators can often be found in this part of the citation.

If the source that you’re citing states that it is a specific version or edition, this information is placed in the “versions” section of the citation.

When including a numbered edition, do not type out the number, use the numeral. Also, abbreviate the word “edition” to “ed.”

Here is an example of a citation with a specific edition:

%%Koger, Gregory. “Filibustering and Parties in the Modern State.” Congress Reconsidered, edited by Lawrence C. Dodd and Bruce I. Oppenheimer, 10th ed., CQ Press, 2013, pp. 221-236. Google Books, books.google.com/books?id=b7gkLlSEeqwC&lpg=PP1&dq=10th%20edition&pg=PR6#v=onepage&q=10th%20edition&f=false.

Many sources have numbers associated with them. If you see a number different than the date, page numbers, or editions, include this information in the “numbers” section of the citation. For MLA citing, this includes volume and/or issue numbers (use the abbreviations vol. and no.), episode numbers, track numbers, or any other numbers that will help readers identify the specific source that you used. Do not include ISBN (International Standard Book Numbers) in the citation.

It is important to include the name of the publisher (the organization that created or published the source), so that readers can locate the exact source themselves.

Include publishers for all sources except periodicals. Also, for websites, exclude this information when the name of the publisher matches the name of the website. Furthermore, the name of the publisher is often excluded from the citation for second containers, since the publisher of the second container is not necessarily responsible for the creation or production of the source’s content.

Publication dates

Publication dates are extremely important to include in citations. They allow the reader to understand when sources were published. They are also used when readers are attempting to locate the source themselves.

Dates can be written in MLA in one of two ways. Researchers can write dates as:

Day Mo. Year

Mo. Day, Year

Whichever format you decide to use, use the same format for all of your citations. If using the Citation Machine citation generator, the date will be formatted in the same way for each citation.

While it isn’t necessary to include the full date for all source citations, use the amount of information that makes the most sense to help your readers understand and locate the source themselves.

Wondering what to do when your source has more than one date? Use the date that is most applicable to your research.

The location generally refers to the place where the readers can find the source. This includes page ranges, URLs, DOI numbers, track numbers, disc numbers, or even cities and towns.

You can usually leave out http:// or https:// from URLs unless you want to hyperlink them. For DOIs, use http:// or https:// before the DOI: https://doi.org/xx.xxxx/xxx.xxxx.xxxx .

For page numbers, when citing a source found on only one page, use p.

Example: p. 6.

When citing a source that has a page range, use pp. and then add the page numbers.

Example: pp. 24-38.

Since the location is the final piece of the citation, place a period at the end. When it comes to URLs, many students wonder if the links in citations should be live or not. If the paper is being shared electronically with a teacher and other readers, it may be helpful to include live links. If you’re not sure whether to include live links or not, ask your teacher or professor for guidance.

Looking for an online tool to do the work for you? Citation Machine citing tools could help! Our site is simple (and fun!) to use.

Need some more help? There is further good information here .

Common Citation Examples

ALL sources use this format:

%%Last name of the author, First name of the author. “Source’s Title.” Container’s Title, roles and names of any other individuals who helped contribute to the source, the version of the source, any numbers associated with the source, the name of the publisher, the date the source was published, the location where individuals can find the source themselves (usually a URL or page range). *Title of Second Container, roles and names of any other contributors, the version of the second container, any numbers associated with the second container, the name of the second container’s publisher, the date the second container was published, location.

*If the source does not have a second container, omit this last part of the citation.

Remember, the Citation Machine MLA formatter can help you save time and energy when creating your citations. Check out our MLA Citation Machine pages to learn more.

• Journal Articles

How to Format a Paper

When it comes to formatting your paper or essay for academic purposes, there are specific MLA paper format guidelines to follow.

• Use paper that is 8½-by-11 inch in size. This is the standard size for copier and printer paper.
• Use high quality paper.
• Your research paper or essay should have a one-inch margin on the top, bottom, left, and right sides of the paper.
• While most word processors automatically format your paper to have one-inch margins, you can check or modify the margins of your paper by going to the “Page setup” section of your word processor.

Which font is acceptable to use?

• Use an easily readable font, specifically one that allows readers to see the difference between regular and italicized letters.
• Times New Roman, Arial, and Helvetica are recommended options.
• Use 12-point size font.

Should I double-space the paper, including citations?

• Double-space the entire paper.
• There should be a double space between each piece of information in the heading.
• Place a double space between the heading and the title.
• Place a double space between the title and the beginning of the essay.
• The works-cited list should be double-spaced as well. All citations are double-spaced.

Justification & Punctuation

• Text should be left-justified, meaning that the text is aligned, or flush, against the left margin.
• Indents signal to the reader that a new concept or idea is about to begin.
• Use the “tab” button on your keyboard to create an indent.
• Add one space after all punctuation marks.

Heading & Title

• Include a proper heading and title
• The heading should include the following, on separate lines, starting one inch from the top and left margins:
• Your full name
• Your teacher or professor’s name
• The course number
• Dates in the heading and the body of your essay should be consistent. Use the same format, either Day Month Year or Month Day, Year throughout the entire paper
• Examples: 27 July 2017 or July 27, 2017
• The title should be underneath the heading, centered in the middle of the page, without bold, underlined, italicized, or all capital letters.

Page numbers

• Number all pages, including the very first page and the works-cited list.
• Place page numbers in the top right corner, half an inch from the top margin and one inch from the right margin.
• Include your last name to the left of the page number. Example: Jacobson 4

Here’s an example to provide you with a visual:

If you need help with sentence structure or grammar, check out our paper checker. The paper checker will help to check every noun , verb , and adjective . If there are words that are misspelled or out of place, the paper checker will suggest edits and provide recommendations.

• If a citation flows onto the second line, indent it in half an inch from the left margin (called a “hanging indent”).
• For more information on the works-cited list, refer to “How to Make a Works Cited Page,” which is found below.

How to Create a Title Page

According to the Modern Language Association’s official guidelines for formatting a research paper, it is unnecessary to create or include an individual title page, or MLA cover page, at the beginning of a research project. Instead, follow the directions above, under “Heading & Title,” to create a proper heading. This heading is featured at the top of the first page of the research paper or research assignment.

If your instructor or professor does in fact require or ask for an MLA title page, follow the directions that you are given. They should provide you with the information needed to create a separate, individual title page. If they do not provide you with instructions, and you are left to create it at your own discretion, use the header information above to help you develop your research paper title page. You may want to include other information, such as the name of your school or university.

How to Make a Works Cited Page

The MLA Works Cited page is generally found at the end of a research paper or project. It contains a list of all the citations of sources used for the research project. Follow these directions to format the works-cited list to match the Modern Language Association’s guidelines.

• The “Works Cited” page has its own page at the end of a research project.
• Include the same running head as the rest of the project (Your last name and then the page number). The “Works Cited” page has the final page number for the project.
• Name the page “Works Cited,” unless your list only includes one citation. In that case, title it in MLA “Work Cited.”
• The title of the page (either “Works Cited” or “Work Cited”) is placed one inch from the top of the page, centered in the middle of the document.
• Double space the entire document, even between the title of the page and the first citation.
• Citations are listed in alphabetical order by the first word in the citation (usually the last name of the author or the first word in the title if the citation does not include the author’s name. Ignore “A,” “An,” and “The” if the title begins with these words.)
• If there are multiple citations by the same author, place them in chronological order by the date published.
• Also, instead of writing the author’s name twice in both citations, use three hyphens.

%%Angelou, Maya. I Know Why the Caged Bird Sings. Random House, 2009.

%%---. Gather Together in My Name. Random House, 1974.

• All citations begin flush against the left margin. If the citation is long and rolls onto a second or third line, indent the lines below the first line half an inch from the left margin. This is called a “hanging indent.” The purpose of a hanging indent is to make the citations easier to read. If you’re using our MLA citation machine, we’ll format each of your references with a hanging indent for you.

%%Wai-Chung, Ho. “Political Influences on Curriculum Content and Musical Meaning: Hong Kong Secondary Music Education, 1949-1997.” Journal of Historical Research in Music Education, vol. 22, no. 1, 1 Oct. 2000, pp. 5-25. Periodicals Index Online, search-proquest-com.i.ezproxy.nypl.org/pio/docview/1297849364/citation/6B70D633F50C4EA0PQ/78?accountid=35635.

• MLA “Works Cited” pages can be longer than one page. Use as many pages as necessary. If you have only one source to cite, do not place the one citation below the text of your paper. In MLA, a “Work Cited” page is still created for that individual citation.

Here’s a sample paper to give you an idea of what an MLA paper could look like. Included at the end is an MLA “Works Cited” page example.

Looking to add a relevant image, figure, table, or musical score to your paper? Here’s the easy way to do it, while following guidelines set forth by the Modern Language Association:

• Place the image, figure, table, or music close to where it’s mentioned in the text.
• Provide source information and any additional notes directly below the image, figure, table, or music.

For tables:

• Label the table as “Table” followed by an arabic numeral such as “1.” Table 1 is the table closest to the beginning of the paper. The next table mentioned in the text would be Table 2, and so on.
• Create a title for the table and place it below the label. Capitalize all important words.
• The label (Table 1) and the title should be flush against the left margin.
• Double-space everything.

• A figure can be a map, photograph, painting, pie chart, or any other type of image.
• Create a label and place it below the figure. The figure first mentioned in the text of the project is either “Figure 1” or “Fig 1.” Though figures are usually abbreviated to “Fig.” Choose one style and use it consistently. The next mentioned figure is “Figure 2” or “Fig. 2.”, and so on.
• Place a caption next to the label. If all of the source information is included in the caption, there isn’t a need to replicate that information in the works-cited list.

MLA Final Checklist

Think you’re through? We know this guide covered a LOT of information, so before you hand in that assignment, here’s a checklist to help you determine if you have everything you need:

_ Are both in-text and full citations included in the project? Remember, for every piece of outside information included in the text, there should be a corresponding in-text citation next to it. Include the full citation at the end, on the “Works Cited” page.

_ Are all citations, both in-text and full, properly formatted in MLA style? If you’re unsure, try out our citation generator!

_ Is your paper double-spaced in its entirety with one inch margins?

_ Do you have a running header on each page? (Your last name followed by the page number)

_ Did you use a font that is easy to read?

_ Are all citations on the MLA format works-cited list in alphabetical order?

Our plagiarism checker scans for any accidental instances of plagiarism. It scans for grammar and spelling errors, too. If you have an adverb , preposition , or conjunction that needs a slight adjustment, we may be able to suggest an edit.

Common Ways Students Accidentally Plagiarize

We spoke a bit about plagiarism at the beginning of this guide. Since you’re a responsible researcher, we’re sure you didn’t purposely plagiarize any portions of your paper. Did you know students and scholars sometimes accidentally plagiarize? Unfortunately, it happens more often than you probably realize. Luckily, there are ways to prevent accidental plagiarism and even some online tools to help!

Here are some common ways students accidentally plagiarize in their research papers and assignments:

1. Poor Paraphrasing

In the “How to create a paraphrase” section towards the top of this page, we share that paraphrases are “recycled information, in the paper writer’s own words and writing style.” If you attempt to paraphrase a few lines of text and it ends up looking and sounding too close to the original author’s words, it’s a poor paraphrase and considered plagiarism.

2. Incorrect Citations

If you cite something incorrectly, even if it’s done accidentally, it’s plagiarism. Any incorrect information in a reference, such as the wrong author name or the incorrect title, results in plagiarism.

3. Forgetting to include quotation marks

When you include a quote in your paper, you must place quotation marks around it. Failing to do so results in plagiarism.

If you’re worried about accidental plagiarism, try our Citation Machine Plus essay tool. It scans for grammar, but it also checks for any instances of accidental plagiarism. It’s simple and user-friendly, making it a great choice for stress-free paper editing and publishing.

Updated June 15, 2021

Written and edited by Michele Kirschenbaum and Wendy Ikemoto. Michele Kirschenbaum has been an awesome school librarian since 2006 and is an expert in citing sources. Wendy Ikemoto has a master’s degree in library and information science and has been working for Citation Machine since 2012.

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Free MLA Citation Generator

Generate accurate citations in MLA format automatically, with MyBib!

😕 What is an MLA Citation Generator?

An MLA citation generator is a software tool designed to automatically create academic citations in the Modern Language Association (MLA) citation format. The generator will take information such as document titles, author, and URLs as in input, and output fully formatted citations that can be inserted into the Works Cited page of an MLA-compliant academic paper.

The citations on a Works Cited page show the external sources that were used to write the main body of the academic paper, either directly as references and quotes, or indirectly as ideas.

👩‍🎓 Who uses an MLA Citation Generator?

MLA style is most often used by middle school and high school students in preparation for transition to college and further education. Ironically, MLA style is not actually used all that often beyond middle and high school, with APA (American Psychological Association) style being the favored style at colleges across the country.

It is also important at this level to learn why it's critical to cite sources, not just how to cite them.

🙌 Why should I use a Citation Generator?

Writing citations manually is time consuming and error prone. Automating this process with a citation generator is easy, straightforward, and gives accurate results. It's also easier to keep citations organized and in the correct order.

The Works Cited page contributes to the overall grade of a paper, so it is important to produce accurately formatted citations that follow the guidelines in the official MLA Handbook .

⚙️ How do I use MyBib's MLA Citation Generator?

It's super easy to create MLA style citations with our MLA Citation Generator. Scroll back up to the generator at the top of the page and select the type of source you're citing. Books, journal articles, and webpages are all examples of the types of sources our generator can cite automatically. Then either search for the source, or enter the details manually in the citation form.

The generator will produce a formatted MLA citation that can be copied and pasted directly into your document, or saved to MyBib as part of your overall Works Cited page (which can be downloaded fully later!).

MyBib supports the following for MLA style:

Daniel is a qualified librarian, former teacher, and citation expert. He has been contributing to MyBib since 2018.

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What Is Cite This For Me’s Citation Generator?

Cite This For Me’s open-access generator is an automated citation machine that turns any of your sources into citations in just a click. Using a citation generator helps students to integrate referencing into their research and writing routine; turning a time-consuming ordeal into a simple task.

A citation machine is essentially a works cited generator that accesses information from across the web, drawing the relevant information into a fully-formatted bibliography that clearly presents all of the sources that have contributed to your work.

If you don’t know how to cite correctly, or have a fast-approaching deadline, Cite This For Me’s accurate and intuitive citation machine will lend you the confidence to realise your full academic potential. In order to get a grade that reflects all your hard work, your citations must be accurate and complete. Using a citation maker to create your references not only saves you time but also ensures that you don’t lose valuable marks on your assignment.

Not sure how to format your citations, what citations are, or just want to find out more about Cite This For Me’s citation machine? This guide outlines everything you need to know to equip yourself with the know-how and confidence to research and cite a wide range of diverse sources in your work.

Why Do I Need To Cite?

Simply put, referencing is the citing of sources used in essays, articles, research, conferences etc. When another source contributes to your work, you have to give the original owner the appropriate credit. After all, you wouldn’t steal someone else’s possessions so why would you steal their ideas?

Any factual material or ideas you take from another source must be acknowledged in a reference, unless it is common knowledge (e.g. President Kennedy was killed in 1963). Failing to credit all of your sources, even when you’ve paraphrased or completely reworded the information, is plagiarism. Plagiarizing will result in disciplinary action, which can range from losing precious points on your assignment to expulsion from your university.

What’s more, attributing your research infuses credibility and authority into your work, both by supporting your own ideas and by demonstrating the breadth of your research. For many students, crediting sources can be a confusing and tedious process, but it’s a surefire way to improve the quality of your work so it’s essential to get it right. Luckily for you, using Cite This For Me’s citation machine makes creating accurate references easier than ever, leaving more time for you to excel in your studies.

In summary, the referencing process serves three main functions:

• To validate the statements and conclusions in your work by providing directions to other sound sources that support and verify them.
• To help your readers locate, read and check your sources, as well as establishing their contribution to your work.
• To give credit to the original author and hence avoid committing intellectual property theft (known as ‘plagiarism’ in academia).

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• Introduction
• Conclusions
• Article Information

ACE indicates adverse childhood experience; CATSS, Child and Adolescent Twin Study in Sweden; LSC-R, Life Stressor Checklist-Revised; STAGE, Study of Twin Adults: Genes and Environment; YATSS, Young Adult Twins in Sweden Study.

Associations are given in the full cohort and in exposure-discordant twin pairs; odds ratios (ORs) are per additional ACE. Models were adjusted for age and sex; 95% CIs are based on robust standard errors calculated using generalized estimating equations. DZ indicates dizygotic twins; MZ, monozygotic twins; OR, odds ratio.

Associations are given in the full cohort and in exposure-discordant twin pairs; odds ratios (ORs) are for any ACE vs no ACE. Models were adjusted for age and sex; 95% CIs are based on robust standard errors calculated using generalized estimating equations. DZ indicates dizygotic twins; MZ, monozygotic twins.

eTable 1. Items Applied From the Life Stressor Checklist-Revised to Assess Adverse Childhood Experiences in the Swedish Twin Registry

eTable 2. International Classification of Diseases (ICD) Codes Used to Identify Psychiatric Disorders

eTable 3. Associations Between No. of Adverse Childhood Experiences and Any Psychiatric Disorder in full Cohort by Sex

eTable 4. Associations Between No. of Adverse Childhood Experiences and Symptoms of Depression in Full Cohort and in Exposure-Discordant Twin Pairs

eTable 5. No. of Twin Individuals in Full Twin Pairs, Exposed Twin Individuals, and Exposure-Discordant Twins

eTable 6. Associations Between No. of Adverse Childhood Experiences and Any Diagnosed Psychiatric Disorder in Full Cohort and in Exposure-Discordant Twin Pairs Excluding the Child and Adolescent Twin Study in Sweden

eTable 7. Associations Between No. of Adverse Childhood Experiences and Any Diagnosed Psychiatric Disorder in Full Cohort and in Exposure-Discordant Twin Pairs Excluding the Study of Twin Adults: Genes and Environment

eTable 8. Associations Between No. of Adverse Childhood Experiences and Any Diagnosed Psychiatric Disorder in Full Cohort and in Exposure-Discordant Twin Pairs in the Study of Twin Adults: Genes and Environment

eTable 9. Associations Between No. of Adverse Childhood Experiences and Any Diagnosed Psychiatric Disorder Including Dispensed Psychotropic Medications as Indication for Mild Psychiatric Disorder Not Attended by Specialist Care in full Cohort and in Exposure-Discordant Twin Pairs

eTable 10. Associations Between No. of Adverse Childhood Experiences and Any Diagnosed Psychiatric Disorder in Full Cohort and in Exposure-Discordant Twin Pairs Excluding Twins Diagnosed With Any Psychiatric Disorder Before Age 19 y

eTable 11. Associations Between No. of Adverse Childhood Experiences (ACEs) and Any Diagnosed Psychiatric Disorder in Full Cohort and in Exposure-Discordant Twin Pairs Excluding Twins Diagnosed With Any Psychiatric Disorder Before Answering web-Based Survey With ACE Assessment

eFigure 1. Flowchart of Analytic Sample Excluding Twins Diagnosed With Any Psychiatric Disorder Before Age 19 y

eFigure 2. Flowchart of Analytic Sample Where Follow-Up for Psychiatric Disorders Starts After Web-Based Surveys With Adverse Childhood Experience Assessment Excluding Twins Who Received Diagnosis of Any Psychiatric Disorder Before Answering Survey

eFigure 3. Associations Between Adverse Childhood Experience Subtypes and Depression Symptoms in Full Cohort and Within Exposure-Discordant Twin Pairs

eTable 1. Items Applied From Life Stressor Checklist-Revised Plus Hate Crime to Assess Adverse Childhood Experiences in the Swedish Twin Registry

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Daníelsdóttir HB , Aspelund T , Shen Q, et al. Adverse Childhood Experiences and Adult Mental Health Outcomes. JAMA Psychiatry. 2024;81(6):586–594. doi:10.1001/jamapsychiatry.2024.0039

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Adverse Childhood Experiences and Adult Mental Health Outcomes

• 1 Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland
• 2 Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
• 3 Clinical Research Center for Mental Disorders, Shanghai Pudong New Area Mental Health Center, Tongji University School of Medicine, Shanghai, China
• 4 Institute for Advanced Study, Tongji University, Shanghai, China
• 5 Department of Psychology, Reykjavík University, Reykjavík, Iceland
• 6 West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu, China
• 7 Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
• 8 Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, Sweden
• 9 Department of Epidemiology, Harvard TH Chan School of Public Health, Boston, Massachusetts

Question   Are adverse childhood experiences (ACEs) associated with poor mental health in adulthood after adjustment for familial confounding due to shared genetic and environmental factors?

Findings   In this cohort study using twin data, there were associations between ACEs and adult mental health outcomes in dizygotic and monozygotic twin pairs, while odds ratios were attenuated compared with the full cohort. Twins who were exposed to ACEs compared with co-twins who were not exposed had increased odds of clinically confirmed adult psychiatric disorders, particularly after sexual abuse or multiple ACEs.

Meaning   These findings support an association between ACEs and poor mental health in adulthood, notwithstanding evidence for familial confounding from shared genetic and environmental factors.

Importance   Exposure to adverse childhood experiences (ACEs) has consistently been associated with multiple negative mental health outcomes extending into adulthood. However, given that ACEs and psychiatric disorders cluster within families, it remains to be comprehensively assessed to what extent familial confounding contributes to associations between ACEs and clinically confirmed adult psychiatric disorders.

Objective   To investigate whether associations between ACEs and adult mental health outcomes remain after adjusting for familial (genetic and environmental) confounding.

Design, Setting, and Participants   This Swedish twin cohort study used a discordant twin pair design based on monozygotic (MZ) and dizygotic (DZ) twins. A total of 25 252 adult twins (aged 18-47 years) from the Swedish Twin Registry born between 1959 and 1998 were followed up from age 19 years until 2016, with a maximum follow-up time of 39 years. Data were analyzed from April 2022 to November 2023.

Exposures   A total of 7 ACEs, including family violence, emotional abuse or neglect, physical neglect, physical abuse, sexual abuse, rape, and hate crime, were assessed with items from the Life Stressor Checklist-Revised in a web-based survey.

Main Outcomes and Measures   Adult (ages >18 years) clinical diagnosis of psychiatric disorders (ie, depressive, anxiety, alcohol or drug misuse, or stress-related disorders) were obtained from the Swedish National Patient Register.

Results   Of 25 252 twins included in the study (15 038 female [59.6%]; mean [SD] age at ACE assessment, 29.9 [8.7] years), 9751 individuals (38.6%) reported exposure to at least 1 ACE. A greater number of ACEs was associated with increased odds of any psychiatric disorder in the full cohort (odds ratio [OR] per additional ACE, 1.52; 95% CI, 1.48-1.57). The association remained but ORs per additional ACE were attenuated in DZ (1.29; 95% CI, 1.14-1.47) and MZ (1.20; 95% CI, 1.02-1.40) twin pairs. Individuals who were exposed to sexual abuse compared with those who were not exposed had increased odds of any clinically confirmed psychiatric disorder in all comparisons: full cohort (OR, 3.09; 95% CI, 2.68-3.56), DZ twin pairs (OR, 2.10; 95% CI, 1.33-3.32), and MZ twin pairs (1.80; 95% CI, 1.04-3.11).

Conclusions and relevance   This study found that associations between ACEs and adult mental health outcomes remained after controlling for shared genetic and environmental factors, which was particularly evident after multiple ACEs or sexual abuse. These findings suggest that targeted interventions may be associated with reduced risks of future psychopathology.

Adverse childhood experiences (ACEs) are common, affecting the lives of millions of children and adolescents across the world. 1 - 5 ACEs represent exposures to severe stressors, such as emotional, physical, and sexual abuse, as well as growing up in dysfunctional home environments. 6 A large body of evidence has shown that children exposed to ACEs have increased risks of an array of adverse mental and physical health outcomes throughout life. 7 - 10

Studies have consistently reported associations between ACEs and an increased risk of psychiatric disorders in adulthood, such as posttraumatic stress disorder (PTSD), 11 , 12 depression, 13 - 15 anxiety, 16 and substance abuse. 17 , 18 However, given that ACEs and psychiatric disorders cluster within families, 19 - 21 few studies examining associations of ACE exposure with subsequent psychiatric disorders have been equipped to disentangle these associations from potential genetic confounding and other risk factors shared by family members. Indeed, twin studies show that psychiatric disorders are moderately heritable, with 40% to 60% of individual differences in, for example, depression, anxiety, and PTSD attributable to genetic factors. 22 In addition, twin and family studies suggest that liability for ACEs is also partly attributable to genetic factors, 23 - 25 some of which may overlap with genetic factors that predispose individuals to adverse mental health outcomes. 26 Previously reported associations between ACEs and psychiatric disorders may therefore, at least partly, reflect genetic confounding. Moreover, adjusting for environmental risk factors that contribute to familial confounding is equally important given that aspects of the family environment, such as parenting style 27 and socioeconomic disadvantage, 21 may similarly confound the association between ACEs and psychiatric disorders.

The discordant twin pair design provides a unique opportunity to adjust for unmeasured genetic and early environmental confounders. 28 , 29 A handful of previous studies have used this methodology to examine the ACE and mental health association, but these are limited by addressing only specific types of ACEs or selected mental health outcomes, including alcohol dependence, personality disorders, and attention-deficit/hyperactivity disorder (ADHD). 30 - 36 In addition, these studies were based on small samples, cross-sectional designs, or the use of self-reported measures of mental health. To our knowledge, evidence on how ACEs are associated with clinically confirmed psychiatric disorders with adjustment for familial confounding is completely lacking. Therefore, leveraging a nationwide sample of Swedish twins, we aimed to assess associations between ACEs and prospectively ascertained clinical diagnoses of common adult psychiatric disorders while adjusting for familial confounding. To capture a broader range of psychiatric morbidities, we also examined associations between ACEs and self-reported depressive symptoms.

An ethical permit was granted for this cohort study using twin data by the regional ethical review board in Stockholm, Sweden, and all participants gave written informed consent for participation. The study followed the Strengthening the Reporting of Observational Studies in Epidemiology ( STROBE ) reporting guideline.

We used data from 3 birth cohorts from the nationwide Swedish Twin Registry. Namely, we used the Study of Twin Adults: Genes and Environment (STAGE) comprising 25 313 twins (born 1959-1985) surveyed 2005 to 2006, 37 , 38 the Young Adult Twins in Sweden Study (YATSS) comprising 6860 twins (born 1986-1992) surveyed 2013 to 2014, 39 and the ongoing Child and Adolescent Twin Study in Sweden (CATSS) comprising 7613 twins (born 1992-1998) 40 surveyed in relation to their 18th birthday between 2010 and 2016. 40 All twins responded to web-based surveys, including assessments of ACEs and depressive symptoms, with response rates of 60.0%, 42.0%, and 69.0%, respectively, in the 3 cohorts. 39 Cohorts were additionally linked to nationwide health registers. In this study, we had access to data on ACEs from 25 252 twins ( Figure 1 ).

ACEs were measured with items adapted from the Life Stressor Checklist-Revised (LSC-R). 41 , 42 For this study, 7 yes or no questions were used to assess exposure to the following ACEs: emotional neglect or abuse, physical neglect, physical abuse, sexual abuse, rape, hate crime, and witnessing family violence (eTable 1 in Supplement 1 ). The overall LSC-R has demonstrated good reliability (interrater reliability and test-retest reliability) and validity (content validity and construct validity) to measure trauma exposure and other negative life experiences. 41 , 42 Specific items used in this study have acceptable test-retest reliability (κ range, 0.56-0.66). 42 Follow-up questions were used to assess whether the 7 LSC-R items were endorsed before age 19 years. We examined exposure to the 7 types of ACEs individually (yes or no) and calculated an ACE total score ranging from 0 to 7, which we also categorized into 0, 1, 2, or 3 or more ACEs.

Using Swedish personal identification numbers, the Swedish Twin Registry was linked to the Swedish National Patient Register, established in 1964 with nationwide coverage for inpatient care since 1987 and outpatient specialized care since 2001. 43 Through this resource, we identified all individuals with any inpatient or outpatient hospital visit that resulted in a diagnosis of a depressive disorder, anxiety disorder, alcohol or drug misuse disorder, or stress-related disorder after their 19th birthday ( Figure 1 ). Participants were followed up in the National Patient Register from age 19 years until the end of 2016, resulting in a follow-up range of 13 to 39 years in STAGE, 6 to 13 years in YATSS, and 0 to 5 years in CATSS. Diagnoses were ascertained in accordance with the Swedish revisions of the International Classification of Diseases, Eighth Revision ( ICD-8 ), International Classification of Diseases, Ninth Revision ( ICD-9 ), or International Statistical Classification of Diseases and Related Health Problems, Tenth Revision ( ICD-10 ) (eTable 2 in Supplement 1 ).

Symptoms of depression during the past week were measured with the 11-item shortened version of the Center for Epidemiologic Studies Depression Scale (CES-D). 44 All items were answered on a 4-point scale and then summed to create a total score ranging from 0 to 33, with a higher score indicating higher levels of depressive symptoms.

Descriptive statistics (means and frequencies) of age at survey, sex, zygosity, and mental health outcomes were summarized for the full analytic sample and by number of ACEs. We calculated the heritability ( h 2 ) of the ACE total score (ie, the proportion of variance attributed to additive genetic factors) with a univariate twin model using the OpenMx package in R statistical software version 4.3.1 (R Project for Statistical Computing). 45

We used generalized estimating equation analyses with cluster-robust standard errors (drgee package in R) 46 to examine the association between ACEs and any adult psychiatric disorder and subcategories of these disorders. First, we examined whether ACEs were associated with adult psychiatric disorders in the full cohort (ie, not in twin pairs). Given that outcomes were binary, we estimated odds ratios (ORs) and adjusted the analysis for sex and age (continuous) at the time of the survey. To account for the lack of independence of twin data, we used generalized estimating equation analyses with cluster robust standard errors (ie, using sandwich estimation on twin pair identification number). 46 We ran all models with the ACE score as a continuous variable (range, 0-7), binary variable (exposed to any ACE vs not exposed), and categorical variable (categories of 0, 1, 2, or ≥3 ACEs). We also carried out stratified analyses of these associations by sex. In addition, we ran separate models for each of the 7 types of ACEs.

Second, discordant twin pair analysis was used to estimate the association between ACEs and psychiatric disorders while controlling for familial (ie, genetic and environmental) factors shared in the twin pair. To do this, we fitted models conditional on twin pairs using generalized estimating equation analyses 46 separately in monozygotic (MZ) and dizygotic (DZ) twin pairs. These models tested whether a twin exposed to greater levels of ACEs had greater odds of psychiatric disorders compared with their co-twin who had fewer reported ACEs or was not exposed. 29 Confounding by sex and age was intrinsically adjusted for by the twin design, but given that same- and opposite-sex DZ twin pairs were included, we adjusted for sex in discordant DZ twin pair analyses.

We repeated all cohort-level and discordant twin pair models on self-reported depressive symptoms using generalized estimating equation analyses with identity link. The total score of depressive symptoms was log transformed (log1p function in R), and we obtained estimates as the percentage increase in depressive symptoms for every 1-unit increase in number of ACEs.

First, to examine whether associations varied by birth cohort, we conducted analyses excluding CATSS given that it is the youngest birth cohort with the shortest follow-up time. We also ran analyses in the youngest 2 birth cohorts (YATSS and CATSS) and the oldest cohort (STAGE) separately, to assess potential modification by birth cohort. Second, because the National Patient Register includes only information related to inpatient or specialized outpatient care, we ran a sensitivity analysis using information from the Swedish Prescribed Drug Register, 47 using dispensed antidepressants or anxiolytics (Anatomical Therapeutic Chemical codes N06A and N05B, respectively) as an indication of milder psychiatric disorders not requiring specialized care. Third, to inform risks of reverse causation, we carried out sensitivity analyses in which we excluded twins with any diagnosis of psychiatric disorders before age 19 years (eFigure 1 in Supplement 1 ). Fourth, to perform analyses in which psychiatric disorders were prospectively ascertained after administration of the ACE questionnaire, we restricted the follow-up time of all 3 cohorts to the date after the survey of ACEs and excluded twins who received a diagnosis of any psychiatric disorder before answering the survey (eFigure 2 in Supplement 1 ).

Among 25 252 twins (15 038 female [59.6%]; mean[SD] age at ACE assessment, 29.9 [8.7] years), 9751 participants (38.6%) reported exposure to at least 1 ACE. A total of 2046 individuals (8.1%) reported 3 or more ACEs, while 15 501 individuals (61.4%) reported 0 ACEs ( Table 1 ). A univariate twin model showed that variation in exposure to number of ACEs was accounted for by additive genetic factors (34.6%; 95% CI, 25.2%-44.0%), shared environmental factors (22.1%; 95% CI, 14.3%-29.9%), and nonshared environmental factors (43.3%; 95% CI, 40.1%-46.5%).

A total of 2379 twins (9.4%) received a clinical diagnosis of any psychiatric disorder during the study period ( Table 1 ). The incidence of any psychiatric disorder increased from 993 individuals (6.4%) among participants without any ACEs to 503 individuals (24.6%) among those reporting 3 or more ACEs ( Table 1 ); the pattern was also present for each subcategory and for depressive symptoms.

At the cohort level, a greater number of ACEs was associated with increased odds of any psychiatric disorder in a dose-dependent manner ( Table 2 ). Every additional ACE was associated with 52% greater odds of any psychiatric disorder (OR, 1.52; 95% CI, 1.48-1.57). The same pattern was noted among males and females (eTable 3 in Supplement 1 ). Discordant twin pair analyses revealed statistically significant but lower increases in odds of any psychiatric disorder associated with every additional ACE (DZ twin pairs: OR, 1.29; 95% CI, 1.14-1.47; MZ twin pairs: OR, 1.20; 95% CI, 1.02-1.40), corresponding to 39.1% and 57.5% attenuated ORs in DZ and MZ twins, respectively. Moreover, compared with 0 ACEs, exposure to 3 or more ACEs was associated with greater odds of any psychiatric disorder at the cohort level and in DZ and MZ twin pairs ( Table 2 ). However, ORs in DZ and MZ twins were approximately half of the cohort-level OR (full cohort: 4.57; 95% CI, 4.05-5.15; DZ twin pairs: 2.25; 95% CI 1.41-3.61; MZ twin pairs: 2.11; 95% CI, 1.13-3.94). Similar results were observed for depressive symptoms (eTable 4 in Supplement 1 ) but with lower attenuation in estimates in discordant twin pair models.

We observed associations between a greater number of ACEs and increased odds of depressive disorders, anxiety disorders, and stress-related disorders at the cohort level and in discordant twin pair models ( Figure 2 ). However, there was an association with substance use disorder in MZ twin pairs but not in DZ twin pairs ( Figure 2 ).

All ACE subtypes were associated with increased odds of any psychiatric disorder in cohort-level analyses ( Figure 3 ). Proportions of twin pair ACE discordance varied from 676 of 1080 twins with exposure (62.6%) on family violence to 211 of 227 twins with exposure (93.0%) on rape for DZ twin pairs and from 481 of 1045 twins with exposure (46.0%) on family violence to 156 of 180 twins with exposure (86.7%) on rape for MZ twin pairs (eTable 5 in Supplement 1 ). In discordant twin pair analyses, point estimates were considerably attenuated for all ACE subtypes except sexual abuse, for which there remained an association in all comparisons; ORs for individuals who were exposed to childhood sexual abuse compared with those who were not exposed were 3.09 (95% CI, 2.68-3.56) in the full cohort, 2.10 (95% CI, 1.33-3.32) in DZ twin pairs, and 1.80 (95% CI, 1.04-3.11) in MZ twin pairs ( Figure 3 ). In contrast, the association between ACE subtypes and depressive symptoms remained in all discordant twin pair models except for physical abuse in MZ twin pairs (eFigure 3 in Supplement 1 ).

In sensitivity analyses, the pattern of associations remained the same when the youngest cohort (CATSS) was excluded from analyses (eTable 6 in Supplement 1 ), while estimates remained larger in the 2 youngest cohorts (YATSS and CATSS) (eTable 7 in Supplement 1 ) than in the oldest cohort (STAGE) (eTable 8 in Supplement 1 ). A similar pattern of associations was found when dispensed psychotropic medications were included as an indication for milder psychiatric disorders (eTable 9 in Supplement 1 ). Excluding participants with any psychiatric disorder prior to age 19 years revealed largely similar estimates, although with lower precision (eTable 10 in Supplement 1 ). Moreover, restricting follow-up of psychiatric disorder diagnosis to the date after the ACE assessment yielded a similar pattern of associations at the cohort level and in discordant DZ twin pair analysis, while estimates had low precision and were substantially diluted in the MZ twin pair analysis (eTable 1 in Supplement 1 ).

In this Swedish cohort study using twin data, we found that ACEs were associated with adult mental health outcomes after adjustment for familial confounding. That is, after adjusting for shared genetic and environmental factors in stringent twin analyses, the association between ACEs and clinically confirmed adult psychiatric disorders remained evident, with particularly large increases in odds after multiple ACEs or sexual abuse. However, attenuated estimates in DZ and MZ twin pairs suggest that familial confounding also contributed to the ACE-mental health association.

In line with a large body of research, 9 , 10 , 17 , 48 we found that exposure to ACEs was phenotypically associated with adult mental health outcomes in a dose-dependent manner. Complementing previous work, we observed that exposure to ACEs was associated with increased odds of clinically confirmed adult psychiatric disorders and increased levels of self-reported depressive symptoms after adjusting for familial confounding due to shared genetic and environmental factors. However, the attenuation of effect sizes from the full cohort to DZ twins (39.1%) and MZ twins (57.5%) also suggests that familial confounding contributed to the association between ACEs and adult mental health outcomes. In other words, our results indicate that childhood environmental conditions (eg, parental education level and other socioeconomic conditions) and genetic predisposition may have contributed to the association between ACEs and adult mental health outcomes. However, further research is needed to determine which factors (genetic factors, early environmental factors, or both) are associated with increases in the risk of adult psychiatric disorders among individuals who experienced ACEs.

Our findings are broadly consistent with previous cross-sectional discordant twin pair studies, which reported that familial confounding contributed at least partly to associations between ACEs and self-reported alcohol dependence, personality disorders, and ADHD symptoms in adulthood. 30 - 33 , 36 In addition, our results are in line with those of a 2023 meta-analysis 49 reporting associations between ACEs and modest increases in risks of mental health problems (ie, assessed mostly in adolescence and young adulthood) after quasi-experimental adjustment for unmeasured confounders. Our study complements this literature with prospectively ascertained data on clinically confirmed adult psychiatric disorders, also yielding findings that associations between ACEs and psychiatric conditions in adulthood remained after adjustment for underlying shared confounders.

Although few estimates were significant between distinct types of ACEs and adult psychiatric disorders in the most stringent MZ analyses, our results demonstrated that familial factors contributed to a lesser extent to the association between sexual abuse and adult psychiatric disorders. This is in line with previous discordant twin pair research consistently indicating independent associations of child sexual abuse with self-assessed depression, anxiety, and substance abuse. 34 , 35 , 50 , 51 Furthermore, we observed that MZ twins exposed to multiple (≥3) ACEs remained more likely compared with their co-twins who were not exposed to be diagnosed with a psychiatric disorder in adulthood. These results are consistent with increasing evidence on the accumulation model of ACEs. 9 , 52

The main strengths of this study include the large, nationwide twin sample and use of prospectively collected data on clinically confirmed psychiatric disorders, ascertained independently from ACE assessments. However, results of the study should be considered in the context of several limitations. First, although the discordant twin pair design inherently adjusts for shared environmental conditions, it is possible that some unmeasured factors that differed between twins, such as the rare occurrence of birth complications of 1 twin, contributed to observed estimates. Another important limitation is that ACEs were retrospectively reported and may thus be subject to recall bias. 53 This is a common approach for assessing ACEs, but we cannot exclude the possibility that current mental health status influenced the reporting of ACEs. 54 , 55 Although the agreement between retrospective and prospective measures of ACEs has been reported to be low, 56 both have been associated with adverse adult health outcomes. 54 Indeed, a 2023 meta-analysis 49 found no differences in associations between retrospective and prospective ACE measures and mental health problems. In our study, estimates observed for associations between ACEs and current depressive symptoms may certainly have been affected by recall bias; however, estimates of clinically confirmed psychiatric disorders may be less vulnerable to such bias. 54 This approach (ie, combining retrospectively reported ACEs and independently ascertained, clinically confirmed psychiatric disorders), as conducted in this study, has been recommended in previous literature. 54

Similarly, given that our assessment of ACEs was based on selected items from the LSC-R deemed most relevant for the Swedish context, our findings are not directly comparable to findings of other studies from other countries and cultures with different sets of ACE items. Comparisons of ACE prevalence across cultures and populations is already complicated for several other reasons; for example, Sweden was the first country to legally ban physical punishment of children, in 1979. 57 Furthermore, twin pair discordance on specific ACEs varied considerably, from 46.0% for family violence in MZ twins to 93.0% for rape in DZ twins; this may reflect the varying familial nature of these exposures. Although family violence had the lowest twin discordance of all ACEs, it may still seem counterintuitive that 46.0% of MZ twins were discordant on family violence given that this exposure unquestionably takes place in the family environment. It should be noted, however, that the question on family violence refers to an incident (until age 18 years) in which the respondent witnessed violence between family members. Although twin pairs are likely to have witnessed a chronic pattern of family violence (ie, repeated events), sporadic incidences of family violence may be witnessed by 1 but not the other twin.

In addition, given that we identified psychiatric disorders through inpatient or specialized outpatient hospital visits, we captured a small proportion of all psychiatric disorders (ie, only the most severe cases). This may have further led us to underestimate the proportion of twins with prevalent psychiatric disorders at age 19 years. Importantly, we were unable to include individuals seeking primary care only; however, this concern was to some extent alleviated given similar results of a sensitivity analyses in which we additionally considered the use of dispensed psychotropic medications as an indication of psychiatric disorders covered in primary care. Furthermore, it should be noted that while nonresponse may have led to some bias, previous attrition analyses of the Swedish Twin Registry cohorts indicated minor differences between responders and nonresponders. 40 , 58 Additionally, although our study included a large sample of Swedish twins, it remains unknown whether the results can be generalized outside of Nordic countries.

This cohort study using twin data found that the association between ACEs and adult mental health outcomes remained after adjusting for familial confounding due to shared genetic and environmental factors. This suggests that interventions targeting ACEs, including primary prevention and enhanced access to evidence-based trauma therapies to individuals who experienced ACEs, may be associated with reduced risk of future psychopathology. However, our findings additionally indicate that family-wide risk factors (eg, genetic predisposition and socioeconomic disadvantage in childhood) also contributed to adult mental health outcomes among individuals who experienced ACEs, suggesting that there may be added value in addressing risk factors within the whole family.

Accepted for Publication: December 31, 2023.

Published Online: March 6, 2024. doi:10.1001/jamapsychiatry.2024.0039

Open Access: This is an open access article distributed under the terms of the CC-BY License . © 2024 Daníelsdóttir HB et al. JAMA Psychiatry .

Corresponding Author: Hilda Björk Daníelsdóttir, MSc, Centre of Public Health Sciences, Faculty of Medicine, University of Iceland, Sturlugata 8, 101 Reykjavík, Iceland ( [email protected] ).

Author Contributions: Ms Daníelsdóttir had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Drs Bergstedt and Valdimarsdóttir contributed equally.

Concept and design: Daníelsdóttir, Aspelund, Jakobsdóttir, Magnusson, Fang, Bergstedt, Valdimarsdóttir.

Acquisition, analysis, or interpretation of data: All authors.

Drafting of the manuscript: Daníelsdóttir, Bergstedt, Valdimarsdóttir.

Critical review of the manuscript for important intellectual content: All authors.

Statistical analysis: Daníelsdóttir, Aspelund, Shen, Jakobsdóttir, Song, Kuja-Halkola, Bergstedt, Valdimarsdóttir.

Obtained funding: Daníelsdóttir, Magnusson, Valdimarsdóttir.

Administrative, technical, or material support: Shen, Halldorsdottir, Magnusson.

Supervision: Aspelund, Halldorsdottir, Larsson, Fall, Magnusson, Bergstedt, Valdimarsdóttir.

Conflict of Interest Disclosures: Dr Shen reported receiving grants from the Outstanding Clinical Discipline Project of Shanghai Pudong and Fundamental Research Fund for the Central Universities in China outside the submitted work. Dr Larsson reported receiving grants from Shire/Takeda and personal fees from Shire/Takeda, Evolan, and Medici outside the submitted work. No other disclosures were reported.

Funding/Support: This work was supported by consolidator grant 726413 from the European Research Council and grant of excellence 163362-051 from the Icelandic Center for Research to Dr Valdimarsdóttir and by European Union Horizon 2020 Research and Innovation Action grant 847776 to Dr Fang. Ms Daníelsdóttir was supported by a doctoral grant from the University of Iceland Research Fund. We acknowledge the Swedish Twin Registry for providing access to data. The Swedish Twin Registry is managed by the Karolinska Institutet and receives funding through the Swedish Research Council under grants 2017-00641 and 2021-00180. We would specifically like to thank Barbro Sandin at the Swedish Twin Registry for her generous help.

Role of the Funder/Sponsor: The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.

Data Sharing Statement: See Supplement 2 .

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How to Cite Sources | Citation Generator & Quick Guide

Citing your sources is essential in  academic writing . Whenever you quote or paraphrase a source (such as a book, article, or webpage), you have to include a  citation crediting the original author.

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Citations are required in all types of academic texts. They are needed for several reasons:

• To avoid plagiarism by indicating when you’re taking information from another source
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A citation is needed whenever you integrate a source into your writing. This usually means quoting or paraphrasing:

• To quote a source , copy a short piece of text word for word and put it inside quotation marks .
• To paraphrase a source , put the text into your own words. It’s important that the paraphrase is not too close to the original wording. You can use the paraphrasing tool if you don’t want to do this manually.

Citations are needed whether you quote or paraphrase, and whatever type of source you use. As well as citing scholarly sources like books and journal articles, don’t forget to include citations for any other sources you use for ideas, examples, or evidence. That includes websites, YouTube videos , and lectures .

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Usually, your institution (or the journal you’re submitting to) will require you to follow a specific citation style, so check your guidelines or ask your instructor.

In some cases, you may have to choose a citation style for yourself. Make sure to pick one style and use it consistently:

• APA Style is widely used in the social sciences and beyond.
• MLA style is common in the humanities.
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• There are many other citation styles for different disciplines.

If in doubt, check with your instructor or read other papers from your field of study to see what style they follow.

In most styles, your citations consist of:

• Brief in-text citations at the relevant points in the text
• A reference list or bibliography containing full information on all the sources you’ve cited

In-text citations most commonly take the form of parenthetical citations featuring the last name of the source’s author and its year of publication (aka author-date citations).

An alternative to this type of in-text citation is the system used in numerical citation styles , where a number is inserted into the text, corresponding to an entry in a numbered reference list.

There are also note citation styles , where you place your citations in either footnotes or endnotes . Since they’re not embedded in the text itself, these citations can provide more detail and sometimes aren’t accompanied by a full reference list or bibliography.

A reference list (aka “Bibliography” or “Works Cited,” depending on the style) is where you provide full information on each of the sources you’ve cited in the text. It appears at the end of your paper, usually with a hanging indent applied to each entry.

The information included in reference entries is broadly similar, whatever citation style you’re using. For each source, you’ll typically include the:

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• Container (e.g., the book an essay was published in, the journal an article appeared in)
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The exact information included varies depending on the source type and the citation style. The order in which the information appears, and how you format it (e.g., capitalization, use of italics) also varies.

Most commonly, the entries in your reference list are alphabetized by author name. This allows the reader to easily find the relevant entry based on the author name in your in-text citation.

In numerical citation styles, the entries in your reference list are numbered, usually based on the order in which you cite them. The reader finds the right entry based on the number that appears in the text.

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Because each style has many small differences regarding things like italicization, capitalization , and punctuation , it can be difficult to get every detail right. Using a citation generator can save you a lot of time and effort.

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When you’re dealing with a lot of sources, it’s easy to make mistakes that could constitute accidental plagiarism. For example, you might forget to add a citation after a quote, or paraphrase a source in a way that’s too close to the original text.

Using a plagiarism checker yourself before you submit your work can help you spot these mistakes before they get you in trouble. Based on the results, you can add any missing citations and rephrase your text where necessary.

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If you want to handle your citations yourself, Scribbr’s free Knowledge Base provides clear, accurate guidance on every aspect of citation. You can see citation examples for a variety of common source types below:

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At college level, you must properly cite your sources in all essays , research papers , and other academic texts (except exams and in-class exercises).

Add a citation whenever you quote , paraphrase , or summarize information or ideas from a source. You should also give full source details in a bibliography or reference list at the end of your text.

The exact format of your citations depends on which citation style you are instructed to use. The most common styles are APA , MLA , and Chicago .

The abbreviation “ et al. ” (Latin for “and others”) is used to shorten citations of sources with multiple authors.

“Et al.” is used in APA in-text citations of sources with 3+ authors, e.g. (Smith et al., 2019). It is not used in APA reference entries .

Use “et al.” for 3+ authors in MLA in-text citations and Works Cited entries.

Use “et al.” for 4+ authors in a Chicago in-text citation , and for 10+ authors in a Chicago bibliography entry.

The Scribbr Citation Generator is developed using the open-source Citation Style Language (CSL) project and Frank Bennett’s citeproc-js . It’s the same technology used by dozens of other popular citation tools, including Mendeley and Zotero.

You can find all the citation styles and locales used in the Scribbr Citation Generator in our publicly accessible repository on Github .

APA format is widely used by professionals, researchers, and students in the social and behavioral sciences, including fields like education, psychology, and business.

Be sure to check the guidelines of your university or the journal you want to be published in to double-check which style you should be using.

MLA Style  is the second most used citation style (after APA ). It is mainly used by students and researchers in humanities fields such as literature, languages, and philosophy.

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Abstract: We introduce Meta 3D Gen (3DGen), a new state-of-the-art, fast pipeline for text-to-3D asset generation. 3DGen offers 3D asset creation with high prompt fidelity and high-quality 3D shapes and textures in under a minute. It supports physically-based rendering (PBR), necessary for 3D asset relighting in real-world applications. Additionally, 3DGen supports generative retexturing of previously generated (or artist-created) 3D shapes using additional textual inputs provided by the user. 3DGen integrates key technical components, Meta 3D AssetGen and Meta 3D TextureGen, that we developed for text-to-3D and text-to-texture generation, respectively. By combining their strengths, 3DGen represents 3D objects simultaneously in three ways: in view space, in volumetric space, and in UV (or texture) space. The integration of these two techniques achieves a win rate of 68% with respect to the single-stage model. We compare 3DGen to numerous industry baselines, and show that it outperforms them in terms of prompt fidelity and visual quality for complex textual prompts, while being significantly faster.

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