Budker. (1971). The life of sharks (4th ed.). Wiedenfeld & Nicolson.
Chicago Style aipamenaBudker. The Life of Sharks. 4th ed. Wiedenfeld & Nicolson, 1971.
MLA aipamenaBudker. The Life of Sharks. 4th ed. Wiedenfeld & Nicolson, 1971.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.