Varnum, K. J. (2016). Exploring discovery: The front door to your library's licensed and digitized content. Facet Publishing.
Chicago-referens (17:e uppl.)Varnum, Kenneth J. Exploring Discovery: The Front Door to Your Library's Licensed and Digitized Content. London: Facet Publishing, 2016.
MLA-referens (9:e uppl.)Varnum, Kenneth J. Exploring Discovery: The Front Door to Your Library's Licensed and Digitized Content. Facet Publishing, 2016.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.