Haswell, W. A., & Parker, T. J. (1897). A text book of zoology. Macmillan.
Lua i Stíl Chicago (17ú heag.)Haswell, William A., agus T. Jeffery Parker. A Text Book of Zoology. London: Macmillan, 1897.
Lua MLA (9ú heag.)Haswell, William A., agus T. Jeffery Parker. A Text Book of Zoology. Macmillan, 1897.
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