APA

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

Chicago

Darwin Charles, . 1981. The descent of man, and selection in relation to sex. Princeton, New Jersey: Princeton University Press.

Harvard

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

MLA

Darwin Charles, . The descent of man, and selection in relation to sex. Princeton, New Jersey: Princeton University Press. 1981.