Credo Reference is an online reference collection made up of over 550 full-text books from the world's best publishers. Unlike Wikipedia, you can cite these authoritative, credible sources in your academic papers and projects.
Encyclopaedia Britannica - Academic Edition combines a credible, academic general encyclopedia with supplementary tools like dictionaries, atlas, country statistics, videos, images, quotations, and timelines.
AccessScience is a comprehensive resource for science research. It includes articles and research updates, images and videos, biographies of well-known scientists, definitions of scientific terms, science and technology news, and a study center for science topics.
The Oxford English Dictionary (OED) is widely regarded as the authority on the English language. It is an unsurpassed guide to the meaning, history, and pronunciation of 600,000 words - past and present - from across the English-speaking world.