APA (7th ed.) Citation

Gehlmann, J. (1961). The challenge of ideas: An essay reader (Rev. ed.). Odyssey Press.

Chicago Style (17th ed.) Citation

Gehlmann, John. The Challenge of Ideas: An Essay Reader. Rev. ed. New York: Odyssey Press, 1961.

MLA (9th ed.) Citation

Gehlmann, John. The Challenge of Ideas: An Essay Reader. Rev. ed. Odyssey Press, 1961.