APA (7th ed.) Citation

Gardner, M. (1997). The last recreations : hydras, eggs, and other mathematical mystifications / Martin Gardner: Hydras, eggs, and other mathematical mystifications. Copernicus.

Chicago Style (17th ed.) Citation

Gardner, Martin. The Last Recreations : Hydras, Eggs, and Other Mathematical Mystifications / Martin Gardner: Hydras, Eggs, and Other Mathematical Mystifications. New York: Copernicus, 1997.

MLA (9th ed.) Citation

Gardner, Martin. The Last Recreations : Hydras, Eggs, and Other Mathematical Mystifications / Martin Gardner: Hydras, Eggs, and Other Mathematical Mystifications. Copernicus, 1997.

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