Cita APA (7th ed.)

Waal, F. B. M. d. (2002). Tree of origin: What primate behavior can tell us about human social evolution (1st Harvard University Press pbk. ed.). Harvard University Press.

Cita Chicago (17th ed.)

Waal, F. B. M. de. Tree of Origin: What Primate Behavior Can Tell Us About Human Social Evolution. 1st Harvard University Press pbk. ed. Cambridge, Mass.: Harvard University Press, 2002.

Cita MLA (9th ed.)

Waal, F. B. M. de. Tree of Origin: What Primate Behavior Can Tell Us About Human Social Evolution. 1st Harvard University Press pbk. ed. Harvard University Press, 2002.