APA (7th ed.) Citation

Corwin, E. S., & Koenig, L. W. (1956). The Presidency today. New York University Press.

Chicago Style (17th ed.) Citation

Corwin, Edward S., and Louis William Koenig. The Presidency Today. New York: New York University Press, 1956.

MLA (9th ed.) Citation

Corwin, Edward S., and Louis William Koenig. The Presidency Today. New York University Press, 1956.