APA (7th ed.) Citation

Roucek, J. S. (1946). Twentieth century political thought. Philosophical library.

Chicago Style (17th ed.) Citation

Roucek, Joseph S. Twentieth Century Political Thought. Philosophical library, 1946.

MLA (9th ed.) Citation

Roucek, Joseph S. Twentieth Century Political Thought. Philosophical library, 1946.

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