Cita APA

Boyd, R., & Silk, J. B. (2000). How humans evolved (2nd ed.). New York: W.W. Norton.

Chicago Style Citation

Boyd, Robert, i Joan B. Silk. How Humans Evolved. 2nd ed. New York: W.W. Norton, 2000.

Cita MLA

Boyd, Robert, i Joan B. Silk. How Humans Evolved. 2nd ed. New York: W.W. Norton, 2000.