Template:Citation Style documentation/id2

• arxiv: ArXiv.
• asin: Amazon Standard Identification Number.
  • asin-tld: ASIN top-level domain for Amazon sites other than the US; valid values: co.jp, co.uk, ca, cn, fr, de, it, es
• bibcode: Bibcode; used by a number of astronomical data systems; example: 1924MNRAS..84..308E.
• doi: Digital object identifier; example: 10.1038/news070508-7; checked to ensure it begins with <syntaxhighlight lang="text" enclose="none">​10.​</syntaxhighlight>; if not an error shows and the page is placed in Category:Pages with DOI errors.
  • doi_brokendate: Date the DOI is broken; use the same format as other dates in the article.
• isbn: International Standard Book Number such as 978-0812695939; see Wikipedia:ISBN and ISBN. Dashes in the ISBN are optional, but preferred. Use the 13-digit ISBN where possible; this can normally be found beneath the barcode as a number beginning 978 or 979. For sources with the older 9 digit SBN system, prefix the number with a zero; thus SBN 812695-93-3 should be entered as |isbn=0812695-93-3.
• issn: International Standard Serial Number; eight characters may be split into two groups of four using a hyphen, but not an N-dash or a space.
• jfm: Jahrbuch über die Fortschritte der Mathematik.
• jstor: JSTOR abstract.
• lccn: Library of Congress Control Number.
• mr: Mathematical Reviews.
• oclc: Online Computer Library Center.
• ol: Open Library.
• osti: Office of Scientific and Technical Information.
• pmc: PubMed Central article number for full-text free repository of an article.
• pmid: PubMed Unique Identifier.
• rfc: Request for Comments.
• ssrn: Social Science Research Network.
• zbl: Zentralblatt MATH.