Cita APA (7a ed.)

Boyd, R., & Silk, J. B. (2006). How humans evolved (4th ed.). W. W. Norton & Co..

Cita Chicago Style (17a ed.)

Boyd, Robert, y Joan B. Silk. How Humans Evolved. 4th ed. New York: W. W. Norton & Co., 2006.

Cita MLA (9a ed.)

Boyd, Robert, y Joan B. Silk. How Humans Evolved. 4th ed. W. W. Norton & Co., 2006.