- Credo Reference
Art, Language, Biography, Business, Food, Geography, History, Law, Literature, Medicine, Music, Philosophy, Psychology, Religion, Science, United States, and Technology. Includes atlases, language, quotation and other dictionaries, and encyclopedias.
- Gale Virtual Reference Library
Poets, novelists, drama, small business, medicine, economics, popular culture, biology. Includes encyclopedias on cancer, genetic disorders, medicine, and alternative medicine.
- Oxford Reference Online: Premium
Oxford Reference Online brings together language and subject reference works from one of the world's biggest and most trusted reference publishers into a single cross-searchable resource. The Premium Collection offers a huge range of fully-indexed, extensively linked, up to date, and cross-searchable dictionary, language reference, and subject reference works published by Oxford University Press.
- Reference Universe
Searchable database of back-of-the-book indexes and article titles from 20,000 reference sources