Cita APA (7a ed.)

Boyd, R., & Silk, J. B. (2005). How humans evolved (4th ed.). W.W. Norton.

Cita Chicago Style (17a ed.)

Boyd, Robert, y Joan B. Silk. How Humans Evolved. 4th ed. New York: W.W. Norton, 2005.

Cita MLA (9a ed.)

Boyd, Robert, y Joan B. Silk. How Humans Evolved. 4th ed. W.W. Norton, 2005.