Sergeant, D. E. (1989). Fur Seals: Maternal Strategies on Land and at Sea, eds. R. I. Gentry and G. L. Kooyman [Review]. Zenodo.
Cita Chicago (17th ed.)Sergeant, David E. Fur Seals: Maternal Strategies on Land and at Sea, Eds. R. I. Gentry and G. L. Kooyman [Review]. Zenodo, 1989.
Cita MLA (9th ed.)Sergeant, David E. Fur Seals: Maternal Strategies on Land and at Sea, Eds. R. I. Gentry and G. L. Kooyman [Review]. Zenodo, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.