Darwin, C. (1898). The Variation of animals and plants under domestication. D. Appleton.
Citazione stile Chigago Style (17a edizione)Darwin, Charles. The Variation of Animals and Plants Under Domestication. New York: D. Appleton, 1898.
Citatione MLA (9a ed.)Darwin, Charles. The Variation of Animals and Plants Under Domestication. D. Appleton, 1898.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.