Dyfyniad APA
Henrich, N., & Henrich, J. P. (2007). Why humans cooperate: A cultural and evolutionary explanation. Oxford University Press.
Dyfyniad Arddull Chicago
Henrich, Natalie, and Joseph Patrick Henrich. Why Humans Cooperate: A Cultural and Evolutionary Explanation. Oxford ; New York: Oxford University Press, 2007.
Dyfyniad MLA
Henrich, Natalie, and Joseph Patrick Henrich. Why Humans Cooperate: A Cultural and Evolutionary Explanation. Oxford University Press, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.