APA (7th ed.) Zitazioa
ebrary, Inc, Perrin, W. F., Würsig, B. G., & Thewissen, J. G. M. (2009). Encyclopedia of marine mammals (2nd ed.). Academic.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, W. F. Perrin, Bernd G. Würsig, eta J. G. M. Thewissen. Encyclopedia of Marine Mammals. 2nd ed. London: Academic, 2009.
MLA (9th ed.) Zitazioa
ebrary, Inc, et al. Encyclopedia of Marine Mammals. 2nd ed. Academic, 2009.
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