APA (7th ed.) Citation

Gardner, M. (1986). Knotted doughnuts and other mathematical entertainments. W.H. Freeman.

Chicago Style (17th ed.) Citation

Gardner, Martin. Knotted Doughnuts and Other Mathematical Entertainments. New York: W.H. Freeman, 1986.

MLA (9th ed.) Citation

Gardner, Martin. Knotted Doughnuts and Other Mathematical Entertainments. W.H. Freeman, 1986.

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