LibGuides: Online Reference Shelf: Reference Gateways

Library of Congress' Virtual Reference Shelf
Online Resources selected for research by the Library of Congress
References.net
References.net is a multidisciplinary web directory of the most useful reference related resources that were carefully hand-picked by our editors. Browse our references collection by category, alphabetically, or simply search by keywords.
RefDesk.com
Since 1995, Refdesk is a free and family-friendly web site that indexes and reviews quality, credible, and current web-based resources.