APA (7th ed.) Citation

Keller, J. (1957). The Why and Wherefore of The Christophers. New York.

Chicago Style (17th ed.) Citation

Keller, James. The Why and Wherefore of The Christophers. New York, 1957.

MLA (8th ed.) Citation

Keller, James. The Why and Wherefore of The Christophers. New York, 1957.

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