Harvard and APA are both author-date citation systems — you cite sources with the author's surname and the year of publication, and you provide full details in a reference list at the end of your paper. This is why they are so often confused. But they are not the same thing. APA is a standardised style governed by the Publication Manual of the American Psychological Association (currently in its 7th edition). Harvard is a broad convention with no single manual — each university publishes its own Harvard guide, and the details can vary.
Why the Confusion?
Harvard and APA look similar on the surface. Both place an in-text citation like this:
(Walker, 2017)
And both list the source in a reference list at the end of the paper. For students who have used one system, switching to the other feels almost identical — until the finer details trip them up. The differences are real, and mixing them in the same paper will cost marks.
The confusion is compounded by the fact that some institutions call their house style "Harvard" even when it closely mirrors APA formatting. If your university provides a branded "Harvard" guide, that guide is your authority — regardless of how closely it resembles APA.
Governance — The Fundamental Difference
This is the single most important distinction:
| Harvard | APA | |
|---|---|---|
| Governing body | None | American Psychological Association |
| Official manual | None — universities publish their own guides | Publication Manual of the American Psychological Association (7th ed., 2020) |
| Variation | High — rules differ between institutions | Low — one set of rules worldwide |
| Updates | Each institution updates independently | Centralised updates (6th ed. → 7th ed.) |
Because Harvard has no single manual, two universities might both require "Harvard referencing" but disagree on whether article titles go in quotation marks, whether to use "and" or "&," or whether access dates are mandatory. APA is the same everywhere.
What this means for you: If you're told to use Harvard, your institution's Harvard guide is your primary reference. If you're told to use APA, the Publication Manual (7th edition) is the definitive source.
In-Text Citation Differences
Both systems cite the author's surname and the year. The differences appear in punctuation and multi-author handling.
Basic Format
| Feature | Harvard | APA (7th Edition) |
|---|---|---|
| Parenthetical citation | (Walker, 2017) | (Walker, 2017) |
| Narrative citation | Walker (2017) | Walker (2017) |
| Page number format | (Walker, 2017, p. 40) | (Walker, 2017, p. 40) |
For single-author sources, the two systems are virtually identical.
Two Authors
| Feature | Harvard (Common Convention) | APA (7th Edition) |
|---|---|---|
| Parenthetical | (Kahneman and Tversky, 2000) | (Kahneman & Tversky, 2000) |
| Narrative | Kahneman and Tversky (2000) | Kahneman and Tversky (2000) |
Notice the difference: APA uses "&" in parenthetical citations but "and" in narrative text. Most UK Harvard guides use "and" in both positions — though some Harvard guides use "&" in parenthetical citations too.
Three or More Authors
| Feature | Harvard | APA (7th Edition) |
|---|---|---|
| Three authors (first use) | (Rahman, Torres and Kim, 2021) or (Rahman et al., 2021) — varies by institution | (Rahman et al., 2021) — always et al. |
| Three authors (subsequent use) | (Rahman et al., 2021) | (Rahman et al., 2021) |
| Four+ authors | (Nguyen et al., 2022) | (Nguyen et al., 2022) |
APA simplified its rule in the 7th edition: three or more authors always use et al. from the first citation. Harvard's threshold varies — some guides require all three names on first use, others allow et al. immediately.
Direct Quotes
| Feature | Harvard | APA (7th Edition) |
|---|---|---|
| Short quote marks | Single quotation marks: '…text…' | Double quotation marks: "…text…" |
| Block quote threshold | ~40 words (varies) | 40 words |
| Page number notation | p. or pp. | p. or pp. |
Most UK Harvard guides use single quotation marks for short quotes — reflecting British English conventions. APA uses double quotation marks, following American English.
Reference List Differences
The reference list is where the differences between Harvard and APA become most visible.
General Structure
| Element | Harvard | APA (7th Edition) |
|---|---|---|
| Title of section | Reference List (or Bibliography) | References |
| Alphabetical order | By author surname | By author surname |
| Hanging indent | Yes | Yes |
| Double spacing | Yes (usually) | Yes |
Book Reference — Side by Side
Harvard:
Walker, M. (2017) Why we sleep: the new science of sleep and dreams. London: Penguin Books.
APA:
Walker, M. (2017). Why we sleep: The new science of sleep and dreams. Penguin Books.
| Difference | Harvard | APA |
|---|---|---|
| Full stop after year | No: (2017) Title | Yes: (2017). Title |
| Subtitle capitalisation | Sentence case throughout: the new science | First word after colon capitalised: The new science |
| Place of publication | Included: London: Penguin Books | Omitted (7th ed. dropped it) |
Journal Article — Side by Side
Harvard:
Diekelmann, S. and Born, J. (2010) 'The memory function of sleep', Nature Reviews Neuroscience, 11(2), pp. 114–126.
APA:
Diekelmann, S., & Born, J. (2010). The memory function of sleep. Nature Reviews Neuroscience, 11(2), 114–126.
| Difference | Harvard | APA |
|---|---|---|
| Article title | In single quotation marks: 'The memory function of sleep' | No quotation marks |
| Connector between authors | "and" | "&" |
| Full stop after year | No | Yes |
| "pp." before page range | Yes: pp. 114–126 | No: 114–126 |
| Volume number | Plain: 11(2) | Italicised: 11(2) |
Website — Side by Side
Harvard:
Kolbert, E. (2017) 'Why facts don't change our minds', The New Yorker. Available at: https://www.newyorker.com/magazine/2017/02/27/why-facts-dont-change-our-minds (Accessed: 5 March 2025).
APA:
Kolbert, E. (2017, February 27). Why facts don't change our minds. The New Yorker. https://www.newyorker.com/magazine/2017/02/27/why-facts-dont-change-our-minds
| Difference | Harvard | APA |
|---|---|---|
| Article title | In single quotation marks | No quotation marks |
| "Available at:" | Yes | No |
| Access date | Yes: (Accessed: 5 March 2025) | Only if content may change |
| Date format | Year only in parentheses | Full date in parentheses: (2017, February 27) |
Paper Formatting Differences
Beyond citations and references, the two styles also differ in how the paper itself is formatted.
| Feature | Harvard | APA (7th Edition) |
|---|---|---|
| Running head | Not required | Required on every page (shortened title in caps) |
| Title page | Varies by institution | Standardised format (title, author, affiliation, course, instructor, date) |
| Abstract | Not typically required (unless your module specifies) | Required for research papers (150–250 words) |
| Headings | No standardised heading levels | Five heading levels with specific formatting |
| Font | Usually 12pt Times New Roman or Arial (varies) | 12pt Times New Roman, 11pt Calibri, 11pt Arial, or 10pt Lucida Sans Unicode |
| Line spacing | Double-spaced (usually) | Double-spaced |
| Margins | 2.54 cm / 1 inch (usually) | 2.54 cm / 1 inch |
APA's formatting rules are prescriptive and detailed. Harvard's are general — your institution fills in the specifics.
Which One Should You Use?
The answer is simple: use whichever style your module or institution requires. This is not a choice you make yourself — your assignment brief, module handbook, or department guidelines will specify the required citation style.
General patterns:
| Region / Discipline | Common Style |
|---|---|
| UK universities (most disciplines) | Harvard |
| Australian universities (most disciplines) | Harvard |
| US universities — psychology, education, social sciences | APA |
| US universities — nursing, business | APA |
| International programmes | Varies — check your brief |
If your assignment says "Harvard" but your university's Harvard guide closely mirrors APA, follow the university guide. The label your institution uses is what counts.
Quick Comparison Table — 10 Common Source Types
| Source Type | Harvard Format | APA Format |
|---|---|---|
| Book | Author (Year) Title. Place: Publisher. | Author (Year). Title. Publisher. |
| Edited book | Editor (ed.) (Year) Title. Place: Publisher. | Editor (Ed.). (Year). Title. Publisher. |
| Book chapter | Author (Year) 'Chapter title', in Editor (ed.) Book title. Place: Publisher, pp. X–Y. | Author (Year). Chapter title. In Editor (Ed.), Book title (pp. X–Y). Publisher. |
| Journal article | Author (Year) 'Title', Journal, Vol(Issue), pp. X–Y. | Author (Year). Title. Journal, Vol(Issue), X–Y. DOI |
| Website | Author (Year) 'Title', Site. Available at: URL (Accessed: Date). | Author (Year, Month Day). Title. Site. URL |
| Newspaper article | Author (Year) 'Title', Newspaper, Day Month. Available at: URL (Accessed: Date). | Author (Year, Month Day). Title. Newspaper. URL |
| Government report | Organisation (Year) Title. Place: Publisher. | Organisation. (Year). Title. URL |
| Dissertation | Author (Year) Title. Level, Institution. | Author (Year). Title [Doctoral dissertation, Institution]. Database. |
| YouTube video | Username (Year) Title [Video]. Available at: URL (Accessed: Date). | Username. (Year, Month Day). Title [Video]. YouTube. URL |
| Social media post | Author/Username (Year) Content [Platform]. Day Month. Available at: URL (Accessed: Date). | Author [@handle]. (Year, Month Day). Content up to 20 words [Type of post]. Platform. URL |
What's Next?
Now that you understand how Harvard and APA compare, explore these related guides:
- Harvard Referencing Style — the complete overview of Harvard referencing
- Harvard General Format — page layout, margins, and formatting conventions
- Harvard Reference List — formatting rules for every element of a reference list entry
- Common Harvard Referencing Mistakes — the most frequent errors, including Harvard/APA mix-ups
