APA vs MLA: Which Citation Style Do You Use?

Three citation systems dominate student and academic writing, and they disagree about almost everything visible: where the year goes, whether titles wear quotes or italics, how many names the reference list can hold. The good news is that the choice is rarely yours to agonize over, and once you know the four or five tells of each style, you can read and produce all of them.

Who uses which citation style?

APA (currently the 7th edition) belongs to psychology, education, nursing, and most social sciences. MLA (9th edition) rules literature, composition, languages, and the humanities at large. Chicago (17th edition) lives in history, philosophy, and the fine arts, and shows up in publishing generally. Sciences have their own pair, ACS and IEEE and friends, plus Vancouver for medicine.

The practical rule: your instructor's syllabus beats every chart ever printed. When nothing is specified, match the discipline of the course you're writing for. A literature paper in APA raises eyebrows exactly the way a psych paper in MLA does.

What actually differs between APA and MLA?

The in-text difference is the deep one. APA cares most about when a claim was made, so the year travels with every citation. MLA cares most about where in the work the words appeared, so the page number travels instead. Everything else, from initials to italics, is bookkeeping that follows from those two priorities.

What does the same article look like in all three?

One real source, Marc Brysbaert's 2019 meta-analysis of reading rate in the Journal of Memory and Language, volume 109, article 104047:

Read the three like a spot-the-difference puzzle: initials versus full names, sentence case versus the title as published, year placement, the parentheses around volume and year in Chicago, and the comma-chained elements of MLA. You can run any article through our citation generator and swap between the three renderings to see them side by side, with a DOI lookup that fills the fields from Crossref.

How do multiple authors work?

• APA: list up to 20 authors, initials for all, ampersand before the last one: Brysbaert, M., & Smith, J. A. In-text, three or more becomes et al. from the first citation.
• MLA: first author inverted, second author natural: Brysbaert, Marc, and Jane A. Smith. Three or more becomes et al. everywhere.
• Chicago: like MLA in the bibliography (first inverted, rest natural), and it lists up to ten before shortening.

Where do Chicago's footnotes fit in?

Chicago actually ships in two flavors. The notes-bibliography version puts a superscript number in the text with a footnote at the bottom of the page and a bibliography at the end. The author-date version looks like APA with the parentheses and dates, aimed at sciences. Check which one your department wants before you start sprinkling footnotes, because converting between them late in a draft is miserable. A full first-note for our example article runs: 1. Marc Brysbaert, "How many words do we read per minute? A meta-analysis of reading rate," Journal of Memory and Language 109 (2019): 104047, https://doi.org/10.1016/j.jml.2019.104047.

What about sources with no author or no date?

Every style has an answer, and none of them is "make something up." No author moves the title into the author slot. No date is n.d. in APA and Chicago; MLA just drops the date and moves on. A corporate author can be named in full in the text so the parenthetical stays readable. The one habit that matters: record what the source itself says, then let the style's pattern place it. Tools help most when your inputs are honest; verify anything a generator produces before it goes into a graded paper.

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