Harvey, Sheridan, Janice Ruth, Barbara Natson, Sara Day, and Evelyn Sinclair, eds. American Women: A Library of Congress Guide for the Study of Women's History and Culture in the United States. Washington, DC: Library of Congress, 2001.

Library Research Using Primary Sources [online]. Berkeley: Library, University of California, 1998- .

Making Sense of Evidence [online]. In History Matters. New York: American Social History Project / Center for Media and Learning, and Fairfax, Va.: Center for History and New Media, George Mason University, 1998- [cited 30 October 2002]. Available from: http://historymatters.gmu.edu/browse/makesense/.

Primary Sources Research [online]. New Haven, Conn.: Yale University Library, 1996- . Available from: http://www.library.yale.edu/ref/err/primsrcs.htm.