APA (7th ed.) Citation

Darwin, C. (1897). The variation of animals and plants under domestication (Authorized ed.). D. Appleton.

Chicago Style (17th ed.) Citation

Darwin, Charles. The Variation of Animals and Plants Under Domestication. Authorized ed. New York: D. Appleton, 1897.

MLA (9th ed.) Citation

Darwin, Charles. The Variation of Animals and Plants Under Domestication. Authorized ed. D. Appleton, 1897.