APA (7th ed.) Citation

Kahan, A. (1985). A guide for the perplexed of the twentieth century. Philos. Libr.

Chicago Style (17th ed.) Citation

Kahan, Aaron. A Guide for the Perplexed of the Twentieth Century. New York: Philos. Libr, 1985.

MLA (9th ed.) Citation

Kahan, Aaron. A Guide for the Perplexed of the Twentieth Century. Philos. Libr, 1985.