Cita APA (7a ed.)

Darwin, C. (1905). The variation of animals and plants under domestication (2nd. ed.). John Murray.

Cita Chicago Style (17a ed.)

Darwin, Charles. The Variation of Animals and Plants Under Domestication. 2nd. ed. London: John Murray, 1905.

Cita MLA (8a ed.)

Darwin, Charles. The Variation of Animals and Plants Under Domestication. 2nd. ed. John Murray, 1905.