Credo Reference: Searches approximately 450 high-quality reference books from leading publishers
This video was created by North Carolina State University Libraries: http://www.lib.ncsu.edu/tutorials/wikipedia
Please resist the urge to use Wikipedia for your research papers. This resource does not contain authorative information and is unsuitable for your research papers. Instead use the following resources to find background information on a topic.
Britannica Online: Searches Britannica's online encyclopedia and articles
Gale Virtual Library: Searches over 175 encyclopedias
Credo Reference: Searches 500 high-quality reference books from leading publishers
Oxford Reference Online: 100+ language, subject dictionaries, reference works in a single cross-searchable resource