Ray, C. E. (1976). Phoca wymani and other tertiary seals (Mammalia: Phocidae): Described from the eastern seaboard of North America. Smithsonian Inst. Press.
Chicago-Zitierstil (17. Ausg.)Ray, Clayton E. Phoca Wymani and Other Tertiary Seals (Mammalia: Phocidae): Described from the Eastern Seaboard of North America. Washington: Smithsonian Inst. Press, 1976.
MLA-Zitierstil (9. Ausg.)Ray, Clayton E. Phoca Wymani and Other Tertiary Seals (Mammalia: Phocidae): Described from the Eastern Seaboard of North America. Smithsonian Inst. Press, 1976.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.