Pfeffer, P. (1989). Predators and Predation. Facts On File.
Tohutoru Kātū Chicago (17th ed.)Pfeffer, Pierre. Predators and Predation. New York: Facts On File, 1989.
Tohutoro MLA (9th ed.)Pfeffer, Pierre. Predators and Predation. Facts On File, 1989.
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