Blackwell Reference Online
The largest social science and humanities reference collection available online Includes nearly fifty Blackwell Companions to literary movements, authors, and genres.
Oxford Reference Online Includes Oxford Dictonary of Literary Terms. A comprehensive collection of Oxford’s 100 language and subject dictionaries Oxford Reference Online: The Core Collection brings together 100 language and subject dictionaries and reference works, include full text companions to American and British Literature. Includes Oxford Dictionary of Literary Terms.
Gale Virtual Reference Library Contains over 130 subject encyclopedias and reference books.
Britannica Online: (a great source for brief overviews of the historical context) a collection of authoritative references, including Britannica's latest article database, hundreds of articles not found in the print Britannica, Merriam-Webster's Collegiate Dictionary (Tenth Edition), the Britannica Book of the Year, and thousands of links to other World Wide Web sites selected by Britannica editors.
Oxford English Dictionary
"The OED Online contains the complete text of the 20-volume Second Edition, first published in 1989, together with its 3-volume Additions Series, published in 1993 (volumes 1 and 2) and 1997 (volume 3). Updated quarterly
The Oxford English Dictionary is the accepted authority on the evolution of the English language over the last millennium. It is an unsurpassed guide to the meaning, history, and pronunciation of over half a million words, both present and past. It traces the usage of words through 2.5 million quotations from a wide range of international English language sources, from classic literature and specialist periodicals to film scripts and cookery books.
The OED covers words from across the English-speaking world, from North America to South Africa, from Australia and New Zealand to the Caribbean. It also offers the best in etymological analysis and in listing of variant spellings, and it shows pronunciation using the International Phonetic Alphabet."
Johns Hopkins Guide to Literary Theory
A guide to criticism from classical antiquity to the present day.
Routledge Encyclopedia of Philosophy
Covers all aspects of philosophy from an international perspective.