APA (7th ed.) Citation

Popkin, R. H., & Stroll, A. (1967). Philosophy made simple. National Book Store.

Chicago Style (17th ed.) Citation

Popkin, Richard Henry, and Avrum Stroll. Philosophy Made Simple. Manila: National Book Store, 1967.

MLA (9th ed.) Citation

Popkin, Richard Henry, and Avrum Stroll. Philosophy Made Simple. National Book Store, 1967.

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