Parker, T. J., & Haswell, W. A. (1940). A Text-book of zoology. Macmillan.
Lua i Stíl Chicago (17ú heag.)Parker, Thomas Jeffrey, agus William A. Haswell. A Text-book of Zoology. London: Macmillan, 1940.
Lua MLA (9ú heag.)Parker, Thomas Jeffrey, agus William A. Haswell. A Text-book of Zoology. Macmillan, 1940.
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