APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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