(en) José R. Castelló, Canids of the World: Wolves, Wild Dogs, Foxes, Jackals, Coyotes, and Their Relatives, Princeton University Press, (ISBN978-0-691-18541-5, lire en ligne), p. 45
(en) Luke Hunter, Field Guide to Carnivores of the World, 2nd edition, Bloomsbury Publishing, (ISBN978-1-4729-8267-4, lire en ligne), p. 124