- Bogen, David S. Bulwark of Liberty: The Court and the First Amendment. Port Washington, NY: Associated University Press, 1984.
- Bracken, Harry M. Freedom of Speech: Words Are Not Deeds. Westport, CT: Praeger, 1994.
- Johnson, John W., ed. Historic U.S. Court Cases, 1690-1990: An Encyclopedia. New York: Garland Publishing, 1992.
- Lane, Robert Wheeler. Beyond the Schoolhouse Gate: Free Speech and theInculcation of Values. Philadelphia, PA: Temple University Press, 1995.
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