APA (7th ed.) Citation

Kahn, H. 1. (1962). Thinking about the unthinkable. Horizon Press.

Chicago Style (17th ed.) Citation

Kahn, Herman 1922. Thinking About the Unthinkable. New York: Horizon Press, 1962.

MLA (9th ed.) Citation

Kahn, Herman 1922. Thinking About the Unthinkable. Horizon Press, 1962.