- Biskupic, Joan, and Elder Witt. Guide to the U.S. Supreme Court, third edition. Washington, DC: Congressional Quarterly Inc., 1997.
- Hall, Kermit L., ed. The Oxford Companion to the Supreme Court of theUnited States. New York: Oxford University Press, 1992.
- Levy, Leonard W., ed. Encyclopedia of the American Constitution. New York: Macmillan, 1986.
- Witt, Elder. Congressional Quarterly's Guide to the Supreme Court,second edition. Washington, DC: Congressional Quarterly Inc., 1990.
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