APA (7th ed.) Citation
Boyd, R., & Silk, J. B. (2003). How humans evolved (3rd ed.). Norton.
Chicago Style (17th ed.) Citation
Boyd, Robert, and Joan B. Silk. How Humans Evolved. 3rd ed. New York: Norton, 2003.
MLA (9th ed.) Citation
Boyd, Robert, and Joan B. Silk. How Humans Evolved. 3rd ed. Norton, 2003.
Warning: These citations may not always be 100% accurate.