Help:ISBN link
The MediaWiki software automatically recognizes inline ISBNs. For example, the wikitext ISBN 0-12-345678-9
becomes ISBN 0-12-345678-9 (the dashes are optional), which corresponds to Special:Booksources/isbn=0123456789. This creates a link to a special page on book sources, where readers can obtain more information about getting a copy of that particular book.
This function may be useful in helping users to determine which book(s) were used as references for a specific article, and because it provides links to various online bookstores. However, ISBNs only identify a specific edition of a book, and the reader will not see the full range of the versions of the book for sale. Therefore, do not use ISBNs alone as a means of identifying books; add a full and proper citation in addition to the ISBN. (See cite your sources for more information about proper citations.)
To discuss additions to the book sources page, please see OpenVistA Wiki talk: Book Sources.