- Bartleby.com includes database of more than twenty reference works, (encyclopedias, dictionaries, thesauri, quotations, and English usage), such as: Bulfinch, 1913; the Columbia Encyclopedia, 6th edition, 2000; the American Heritage Book of English Usage, 1996; Roget's II: the New Thesaurus, 3rd edition, 1995; the American Heritage Dictionary of the English Language, 4th edition, 2000; and more.
Infoplease.com includes the contents of the Information Please Almanacs;coverage includes world, us, history & government, biography, sports, arts & entertainment, health and science, etc.
Oxford Reference Online "contains about 100 dictionary, language reference, and subject reference works published by Oxford University Press."(Princeton only)
- Guide to Reference compiled by librarians, a selective guide to the best reference sources, arranged by discipline. (Princeton only)