APA
Boitani L. &. B. S., . (1983). Simon & Schuster's guide to mammals. Simon & Schuster, New York: .
Chicago
Boitani Luigi & Bartoli Stefania, . 1983. Simon & Schuster's guide to mammals. Simon & Schuster, New York: .
Harvard
Boitani L. &. B. S., . (1983). Simon & Schuster's guide to mammals. Simon & Schuster, New York: .
MLA
Boitani Luigi & Bartoli Stefania, . Simon & Schuster's guide to mammals. Simon & Schuster, New York: . 1983.