APA (7th ed.) Citation

Darwin, C. (1936). The origin of species by means of natural selection: Or, The presevation of favored races in the struggle for life and The descent of man and selection in relation to sex. The Modern library.

Chicago Style (17th ed.) Citation

Darwin, Charles. The Origin of Species by Means of Natural Selection: Or, The Presevation of Favored Races in the Struggle for Life and The Descent of Man and Selection in Relation to Sex. New York: The Modern library, 1936.

MLA (9th ed.) Citation

Darwin, Charles. The Origin of Species by Means of Natural Selection: Or, The Presevation of Favored Races in the Struggle for Life and The Descent of Man and Selection in Relation to Sex. The Modern library, 1936.