Template:Citation Style documentation/id2: Difference between revisions

* <b id="csdoc_isbn">isbn</b>: [[International Standard Book Number]]; for example: <code>978-0-8126-9593-9</code>. {{crossref|(See [[Wikipedia:ISBN]] and {{section link|ISBN|Overview}}.)}} DashesHyphens in the ISBN are optional, but preferred. Use the ISBN actually printed on or in the book. Use the 13-digit ISBN – beginning with 978 or 979 – when it is available. If only a 10-digit ISBN is printed on or in the book, use it. ISBNs can be found on the page with the publisher's information – usually the back of the title page – or beneath the barcode as a number beginning with 978 or 979 (barcodes beginning with any other numbers are not ISBNs). For sources with the older 9-digit SBN system, prefix the number with a zero; thus, ''SBN 902888-45-5'' should be entered as {{para|isbn|0-902888-45-5}}. Do not convert a 10-digit ISBN to 13-digit by just adding the 978 prefix; the last digit is a calculated check digit and just making changes to the numbers will make the ISBN invalid. This parameter should hold only the ISBN without ''any'' additional characters. It is checked for length, invalid characters – anything other than numbers, spaces, and hyphens, with "X" permitted as the last character in a 10-digit ISBN – and the proper check digit. Alias: '''ISBN'''