🔍DOI · ISBN Automatic Citation Lookup
Paste a DOI or ISBN, and CrossRef / Open Library APIs fetch metadata to generate APA, MLA, and Chicago citations. Great for accurate one-click references during paper writing — no more citation typos.
How to use
- 1Enter a DOI (e.g., 10.1038/nature12373) or ISBN (e.g., 9780262033848).
- 2Click lookup to fetch metadata.
- 3Copy APA, MLA, or Chicago output.
FAQ
Which databases are used?+
DOIs hit CrossRef (api.crossref.org); ISBNs hit Open Library (openlibrary.org). Both are public APIs called directly.
Does it work for Korean journals?+
Yes, if the DOI is registered in CrossRef. Most KCI-listed Korean journals are.
Where do I find a DOI?+
Usually on the first page of a paper PDF, the journal's website, or Google Scholar — typically as 'doi.org/10.xxxx/...'.
Where do I find an ISBN?+
Above the barcode on a book's back cover, or by searching Aladin, Kyobo, or Amazon. 10 or 13 digits.
Lookup fails — why?+
(1) Typo in DOI/ISBN, (2) journal not in CrossRef (often non-KCI Korean journals), or (3) deprecated ISBN. Use [Citation Formatter] to enter manually.
Is my data sent externally?+
Only the DOI/ISBN string is sent to CrossRef/Open Library. No other personal data is transmitted.