How to Cite an ISBN in Harvard
Updated July 2026
Citing an isbn in Harvard comes down to one template and a handful of rules. Below: the exact author–date format, a real example produced by our citation engine, and the in-text form — or paste your source into the generator and copy the finished citation.
The Harvard format
Author, A.A. (Year) Title of book. Edition edn. Publisher.
Harvard (author–date) formats a book (by ISBN) reference as shown above. A real example, generated by our citation engine:
Martin, R. C. (2008) Clean Code: A Handbook of Agile Software Craftsmanship. Prentice Hall.
In-text(Martin, 2008)
Finding the pieces
Or skip the hunt: Paste the 10- or 13-digit ISBN into the generator's ISBN tab — hyphens optional, and every field is filled from the source's own record — then select Harvard on the result.
- Copyright page — the back of the title page lists the ISBN
- Back cover — above or below the barcode
- Retailer/library listings — product details on Amazon, Google Books, or WorldCat
- eBook store pages — eBooks carry their own ISBNs, sometimes different from print
Harvard's formatting rules at work
- All authors inverted with initials, joined by 'and' (no ampersand)
- Article titles take 'single quotation marks'; containers are italicized
- Web sources end with Available at: URL (Accessed: date) — the access date is required
- No single official manual exists — check your university's variant for local tweaks
ISBN-specific pitfalls
- An ISBN identifies a book edition — citing by ISBN guarantees you cite the edition you actually used
- The ISBN itself never appears in the finished citation in any style
- Print and eBook editions may have different ISBNs and different years — cite yours
In-text citations in Harvard
Harvard cites in the text with author and year, comma included: (Alvarez, 2024), adding a page for quotes: (Alvarez, 2024, p. 12). Three or more authors use et al.: (Harris et al., 2020). Named in your sentence, only the year is parenthesized: Alvarez (2024) argues…
No author? Use the title in italics or quotes as appropriate. No date? Harvard writes (no date), not n.d.
Building the Reference List
Every in-text citation pairs with a full entry on the Reference List page, alphabetized by author. Add each citation to your bibliography as you generate it, and the Bibliography Builder assembles and exports the finished page to Word with the title, ordering, and indentation Harvard requires.
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Go Premium — $5/monthFrequently asked questions
- What's the basic Harvard format for an isbn?
- Author, A.A. (Year) Title of book. Edition edn. Publisher. — see the worked example above, generated by the same engine that powers the free citation tool.
- ISBN-10 or ISBN-13 — does it matter?
- Either works in the generator; they identify the same edition. ISBN-13 (starting 978/979) is the modern standard.
- How do I cite an isbn in Harvard in-text?
- Author and year: (Alvarez, 2024), adding a page or paragraph locator for direct quotes.
- Can I get this citation in other styles too?
- Yes — every result in the generator renders APA, MLA, Chicago, Harvard, and IEEE simultaneously. Generate once, switch styles with one click.