Best Choices:
Credo Reference
Reference library of encyclopedias, dictionaries, thesauri, and books of quotations.
Gale Ebooks
Variety of reference books covering arts, biography, business, education, environment, general reference, history, information & publishing, law, library science, literature, medicine, multicultural studies, nation & world, religion, science, social science, and technology.
Opposing Viewpoints
Source for information on today’s most controversial and talked about social issues; features viewpoint articles, topic overviews, statistics, primary documents, websites, and magazine & newspaper articles. See the video tutorial.
Also Try:
Weekly reports on issues in the news. Reference entries across Oxford’s dictionaries, companions, and encyclopedias. Brief introductions on a variety of subjects.CQ Researcher
Oxford Reference Online
Very Short Introductions