APA (7th ed.) Citation

Gardner, M. (1987). Riddles of the sphinx and other mathematical puzzle tales. Mathematical Association of America.

Chicago Style (17th ed.) Citation

Gardner, Martin. Riddles of the Sphinx and Other Mathematical Puzzle Tales. Washington, D.C.: Mathematical Association of America, 1987.

MLA (9th ed.) Citation

Gardner, Martin. Riddles of the Sphinx and Other Mathematical Puzzle Tales. Mathematical Association of America, 1987.