APA (7th ed.) Citation

Kreyche, G. F. (1984). 13 thinkers--plus: A sampler of great philosophers. University Press of America.

Chicago Style (17th ed.) Citation

Kreyche, Gerald F. 13 Thinkers--plus: A Sampler of Great Philosophers. Lanham, MD: University Press of America, 1984.

MLA (9th ed.) Citation

Kreyche, Gerald F. 13 Thinkers--plus: A Sampler of Great Philosophers. University Press of America, 1984.