Pratt, H. S. (1935). A manual of the common invertebrate animals: Exclusive of insects. McGraw-Hill.
Citace podle Chicago (17th ed.)Pratt, Henry Sherring. A Manual of the Common Invertebrate Animals: Exclusive of Insects. New York, USA: McGraw-Hill, 1935.
Citace podle MLA (9th ed.)Pratt, Henry Sherring. A Manual of the Common Invertebrate Animals: Exclusive of Insects. McGraw-Hill, 1935.
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