This template is used on 3,80,000+ pages, or roughly 204% of all pages. To avoid major disruption and server load, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them.
Usage
Use this template to create a link (or list of links) to Special:BookSources for one or more International Standard Book Numbers with the usual "ISBN" prefix. The template supports 10- and 13-digit ISBNs (with or without hyphens).
If the leading "ISBN" should not be a link (for example because it is already linked in the article), the link can be suppressed using the link=no parameter:
This template uses Module:Check isxn to validate the ISBN. If the ISBN is not valid, this subtemplate will still generate the link, and it will add the article to Category:Pages with ISBN errors.
Since invalid ISBNs are sometimes used in publications, it is possible to disable the validity check for individual ISBNs given as parameters. In order to do so, add invalid?=yes (with ? replaced by the parameter number 1 to 9) to the template. In this case, the article will be added to Category:Pages with listed invalid ISBNs.
Use this template to create a link (or list of links) to Special:BookSources for one or more International Standard Book Numbers with the usual "ISBN" prefix