Dyfyniad APA
Avise, J. C., & Nicholson, T. H. (2013). Evolutionary perspectives on pregnancy. Columbia University Press.
Dyfyniad Arddull Chicago
Avise, John C., and Trudy H. Nicholson. Evolutionary Perspectives on Pregnancy. New York: Columbia University Press, 2013.
Dyfyniad MLA
Avise, John C., and Trudy H. Nicholson. Evolutionary Perspectives on Pregnancy. Columbia University Press, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.