APA (7th ed.) Zitazioa

Kreyche, G. F. (1976). Thirteen thinkers: A sampler of great philosophers. University Press of America.

Chicago Style (17th ed.) Zitazioa

Kreyche, Gerald F. Thirteen Thinkers: A Sampler of Great Philosophers. Washington, D.C.: University Press of America, 1976.

MLA (9th ed.) Zitazioa

Kreyche, Gerald F. Thirteen Thinkers: A Sampler of Great Philosophers. University Press of America, 1976.