APA (7th ed.) Zitazioa
National Geographic Society. Mamiferos 4 (1̊ed.). RBA Coleccionables ; Weldon Owen Pty Ltd.
Chicago Style (17th ed.) Zitazioa
National Geographic Society. Mamiferos 4. 1̊ed. RBA Coleccionables ; Weldon Owen Pty Ltd.
MLA (9th ed.) Zitazioa
National Geographic Society. Mamiferos 4. 1̊ed. RBA Coleccionables ; Weldon Owen Pty Ltd.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.