Dyfyniad APA

Darwin, C. (1981). The descent of man, and selection in relation to sex. Princeton University Press.

Dyfyniad Arddull Chicago

Darwin, Charles. The Descent of Man, and Selection in Relation to Sex. Princeton, N.J.: Princeton University Press, 1981.

Dyfyniad MLA

Darwin, Charles. The Descent of Man, and Selection in Relation to Sex. Princeton University Press, 1981.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.