APA (7th ed.) Citation

Boyd, R., & Silk, J. B. (2003). How humans evolved. W. W. Norton & Company.

Chicago Style (17th ed.) Citation

Boyd, Robert, and Joan B. Silk. How Humans Evolved. W. W. Norton & Company, 2003.

MLA (8th ed.) Citation

Boyd, Robert, and Joan B. Silk. How Humans Evolved. W. W. Norton & Company, 2003.

Warning: These citations may not always be 100% accurate.