APA (7th ed.) Citation

Gardner, M. (1969). The unexpected hanging: And other mathematical diversions. Simon and Schuster.

Chicago Style (17th ed.) Citation

Gardner, Martin. The Unexpected Hanging: And Other Mathematical Diversions. New York: Simon and Schuster, 1969.

MLA (9th ed.) Citation

Gardner, Martin. The Unexpected Hanging: And Other Mathematical Diversions. Simon and Schuster, 1969.

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