APA (7th ed.) Citation

Pieper, J. (1991). Philosophie, Kontemplation, Weisheit. Kriterien.

Chicago Style (17th ed.) Citation

Pieper, Josef. "Philosophie, Kontemplation, Weisheit." Kriterien 1991.

MLA (8th ed.) Citation

Pieper, Josef. "Philosophie, Kontemplation, Weisheit." Kriterien, 1991.

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