Pechenik, J. A. (2005). Biology of the Invertebrates (5th ed.). McGraw - Hill.
Lua i Stíl Chicago (17ú heag.)Pechenik, Jan A. Biology of the Invertebrates. 5th ed. Boston: McGraw - Hill, 2005.
Lua MLA (9ú heag.)Pechenik, Jan A. Biology of the Invertebrates. 5th ed. McGraw - Hill, 2005.
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