Reference sources are a way to quickly look-up information and are a great way to get to know a topic before conducting more in-depth research. Types of reference sources include:
The collection contains the following subjects: art, biography, business, education, environment, history, information and publishing, law, literature, medicine, multicultural studies, nation and world, religion, science, social science, and technology.
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. Updated quarterly with at least 1000 new and revised entries.