APA (7th ed.) Zitazioa
Burton, M. (1969). The international wildlife encyclopedia. Marshall cavendish.
Chicago Style (17th ed.) Zitazioa
Burton, Maurice. The International Wildlife Encyclopedia. New York: Marshall cavendish, 1969.
MLA (9th ed.) Zitazioa
Burton, Maurice. The International Wildlife Encyclopedia. Marshall cavendish, 1969.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.