APA (7th ed.) Citation

Gardner, M. (1988). Riddles of the Sphinx: And other mathematical puzzle tales (2. print.). Math. Assoc. of America.

Chicago Style (17th ed.) Citation

Gardner, Martin. Riddles of the Sphinx: And Other Mathematical Puzzle Tales. 2. print. Washington, DC: Math. Assoc. of America, 1988.

MLA (9th ed.) Citation

Gardner, Martin. Riddles of the Sphinx: And Other Mathematical Puzzle Tales. 2. print. Math. Assoc. of America, 1988.