Cita APA

Salkind, C. T. n. 1., & Earl, J. M. n. 1. (1960). The contest problem book. Washington: Mathematical Association of America.

Citación estilo Chicago

Salkind, Charles T. n. 1898, y James Mayberry n. 1896 Earl. The Contest Problem Book. Washington: Mathematical Association of America, 1960.

Cita MLA

Salkind, Charles T. n. 1898, y James Mayberry n. 1896 Earl. The Contest Problem Book. Washington: Mathematical Association of America, 1960.