Salkind, C. T. (1961). The contest problem book. Mathematical Association of America.
芝加哥风格引文Salkind, Charles T. The Contest Problem Book. Washington, D.C.: Mathematical Association of America, 1961.
MLA引文Salkind, Charles T. The Contest Problem Book. Mathematical Association of America, 1961.
警告：这些引文格式不一定是100％准确.