APA (7th ed.) Citation

Popkin, R. H., & Stroll, A. (1982). Philosophy made simple. Made Simple Books.

Chicago Style (17th ed.) Citation

Popkin, Richard H., and Avrum Stroll. Philosophy Made Simple. Made Simple Books, 1982.

MLA (8th ed.) Citation

Popkin, Richard H., and Avrum Stroll. Philosophy Made Simple. Made Simple Books, 1982.

Warning: These citations may not always be 100% accurate.