MLA vs APA vs Chicago: Which Style and How to Format It
If you’ve been told to “use APA” or “cite in MLA” and you’re not sure what actually changes, the short version is: they differ in what goes in the in-text citation, what the reference page is called, and which field they put first. This guide compares MLA 9, APA 7, and Chicago side by side, shows the same book cited in all three, and points you to the right generator — APA, MLA, or Chicago — once you know which you need.
The fastest way to tell them apart
Look at the in-text citation. That one detail gives the style away:
| Style | In-text citation | Emphasis |
|---|---|---|
| APA 7 | (Reed, 2022, p. 45) | The year — recency matters |
| MLA 9 | (Reed 45) | The page — the text itself matters |
| Chicago (notes) | A footnote¹ | The note — room for commentary |
APA leads with the date because in the sciences, how recent a source is matters. MLA omits the date in-text because in literature and the humanities, the specific passage matters more than the year. Chicago’s most common form uses footnotes so authors can add discussion without breaking the sentence.
Which discipline uses which
- APA — psychology, education, nursing, business, the social and natural sciences.
- MLA — English, literature, languages, philosophy, and most humanities.
- Chicago — history, art, and publishing. It has two systems: Notes–Bibliography (footnotes + a bibliography, used in the humanities) and Author–Date (parenthetical, much like APA, used in the sciences).
The real rule: follow whatever your instructor, department, or journal specifies. Discipline is only the default when no one tells you.
The same book in all three styles
Here is one source — a 2022 book by Marcus Reed — formatted three ways. Watch where the date moves and how the title is capitalised.
APA 7 (References):
Reed, M. (2022). The shape of arguments. Beacon Press.
MLA 9 (Works Cited):
Reed, Marcus. The Shape of Arguments. Beacon Press, 2022.
Chicago (Bibliography, Notes–Bibliography):
Reed, Marcus. The Shape of Arguments. Boston: Beacon Press, 2022.
Three details to notice:
- The author’s name. APA uses initials (
Reed, M.); MLA and Chicago spell out the first name (Reed, Marcus). - Where the year goes. APA puts it right after the author; MLA and Chicago put it at the end.
- Title capitalisation. APA uses sentence case for book and article titles (
The shape of arguments); MLA and Chicago use title case (The Shape of Arguments).
The reference page has a different name in each
This trips up a lot of students — the list at the end of your paper isn’t called the same thing:
| Style | Page title | Order |
|---|---|---|
| APA | References | Alphabetical by author surname |
| MLA | Works Cited | Alphabetical by author surname |
| Chicago | Bibliography | Alphabetical by author surname |
All three are double-spaced with a hanging indent (first line flush left, the rest indented half an inch). Get the page title wrong and a marker spots the wrong style instantly.
In-text, side by side
For a direct quote from page 45 of that same book:
- APA:
(Reed, 2022, p. 45)— or narratively,Reed (2022) argued… - MLA:
(Reed 45)— orReed argues… - Chicago (notes): a superscript¹ pointing to a footnote:
1. Marcus Reed, The Shape of Arguments (Boston: Beacon Press, 2022), 45.
Notice APA needs p. before the page number, MLA uses the bare number, and Chicago’s first footnote carries the full citation (later notes are shortened).
How to pick — and then format it
- Check the assignment or submission guidelines first. A named style there overrides everything below.
- No instruction? Use your discipline’s default from the list above.
- Writing for a journal? Use its style sheet — many sciences journals use APA or a house variant.
- Once you know the style, generate clean entries with the matching tool: APA Citation Generator, MLA Citation Generator, or Chicago Citation Generator. For the trickier APA source types, see the deeper guide on citing every source type in APA.
FAQ
Can I mix two styles in one paper?
No. Pick one and apply it to every in-text citation and every reference entry. Mixing APA dates with MLA page-only citations is the most common consistency error markers catch.
Is Chicago the same as Turabian?
Turabian is a student-focused simplification of Chicago style with the same two systems (notes–bibliography and author–date). If you’re told “Turabian,” follow Chicago rules unless your guidelines say otherwise.
Which style is “easier”?
MLA’s in-text citations are the shortest (Author page), and APA is very consistent once you learn the author-date pattern. Chicago’s notes system takes the most setup because of footnotes, but it’s the most flexible for commentary.
Do these styles change over time?
Yes — always cite the current edition: APA 7th (2020), MLA 9th (2021), Chicago 17th–18th. Older guides on the web often show outdated rules (for example, APA 6th used “Retrieved from” before URLs; APA 7th dropped it).
What if my source has no author or no date?
All three move the title into the author position when there’s no author. For no date, APA uses (n.d.); MLA and Chicago rely on whatever publication date is available and otherwise note “n.d.” as well.
Once you know which style your paper needs, don’t format entries by hand — pick the matching generator (APA, MLA, Chicago), paste the source details, and let it place the names, dates, and italics correctly.