Bartleby.com: Reference Combines the best of both contemporary and classic reference works into a comprehensive public reference library. IPL: Ready Reference Contains all of the basic research tools, such as dictionaries and encyclopedias, that you expect to find in a library. LibrarySpot.com A free virtual reference center that simplifies the search for the best resources online including acronyms, current events, dictionaries, encyclopedias, maps, public records, quotations, statistics, thesauri, and more.