APA (7th ed.) Citation

Popkin, R. H., & Stroll, A. (1956). Philosophy made simple. Doubleday.

Chicago Style (17th ed.) Citation

Popkin, Richard Henry, and Avrum Stroll. Philosophy Made Simple. Garden City, New York: Doubleday, 1956.

MLA (9th ed.) Citation

Popkin, Richard Henry, and Avrum Stroll. Philosophy Made Simple. Doubleday, 1956.