Morris, P. (1974). A field guide to Pacific Coast shells, including shells of Hawaii and the Gulf of Califorinia: Percy A. Morris (2nd edition., revised and enlarged.). Houghton Mifflin Co.
Citace podle Chicago (17th ed.)Morris, Percy.A. A Field Guide to Pacific Coast Shells, Including Shells of Hawaii and the Gulf of Califorinia: Percy A. Morris. 2nd edition., revised and enlarged. Boston, Massachusetts: Houghton Mifflin Co, 1974.
Citace podle MLA (9th ed.)Morris, Percy.A. A Field Guide to Pacific Coast Shells, Including Shells of Hawaii and the Gulf of Califorinia: Percy A. Morris. 2nd edition., revised and enlarged. Houghton Mifflin Co, 1974.
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