“Book citations on Wikipedia pages can now connect readers to the closest library that carries the book. Thanks to a partnership between the Wikimedia Foundation and OCLC, Wikipedia’s citation tool is now able to use ISBNs to generate citations that link to WorldCat®—the largest database of books in the world, spanning the collections of more than 72,000 libraries. The citation tool had previously only worked with URLs, DOIs and PubMed IDs.