APA (7th ed.) Citation

Gardner, M. (1999). Knotted doughnuts and other mathematical entertainments (5. print.). Freeman.

Chicago Style (17th ed.) Citation

Gardner, Martin. Knotted Doughnuts and Other Mathematical Entertainments. 5. print. New York: Freeman, 1999.

MLA (9th ed.) Citation

Gardner, Martin. Knotted Doughnuts and Other Mathematical Entertainments. 5. print. Freeman, 1999.

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