Cita APA (7a ed.)

Kroeber, E., & Wolff, W. H. (1957). Biology: Comprehensive tests. D. C. Heath and Co..

Cita Chicago Style (17a ed.)

Kroeber, Elsbeth, y Walter H. Wolff. Biology: Comprehensive Tests. Boston: D. C. Heath and Co., 1957.

Cita MLA (8a ed.)

Kroeber, Elsbeth, y Walter H. Wolff. Biology: Comprehensive Tests. D. C. Heath and Co., 1957.