APA (7th ed.) Citation

Darwin, C. (1850). The Origin of species by means of natural selection: Or The preservation of favored races in the struggle for life. W. B. Conkey.

Chicago Style (17th ed.) Citation

Darwin, Charles. The Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life. Chicago: W. B. Conkey, 1850.

MLA (8th ed.) Citation

Darwin, Charles. The Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life. W. B. Conkey, 1850.