APA (7th ed.) Citation

Karr, H., & Dubey, M. (1956). This much I know. Chappell.

Chicago Style (17th ed.) Citation

Karr, Harold, and Matt Dubey. This Much I Know. New York: Chappell, 1956.

MLA (9th ed.) Citation

Karr, Harold, and Matt Dubey. This Much I Know. Chappell, 1956.