Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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