Boyd, R., & Silk, J. B. (1997). How humans evolved. W.W. Norton & Company.
Chicago-čujuhus (17. p.)Boyd, Robert, juo Joan B. Silk. How Humans Evolved. New York: W.W. Norton & Company, 1997.
MLA-čujuhus (9. p.)Boyd, Robert, juo Joan B. Silk. How Humans Evolved. W.W. Norton & Company, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.