Gardner, M. (1987). Riddles of the sphinx and other mathematical puzzle tales. Mathematical Association of America.
芝加哥风格引文Gardner, Martin. Riddles of the Sphinx and Other Mathematical Puzzle Tales. Washington, D.C.: Mathematical Association of America, 1987.
MLA引文Gardner, Martin. Riddles of the Sphinx and Other Mathematical Puzzle Tales. Mathematical Association of America, 1987.
警告：这些引文格式不一定是100％准确.