Dyfyniad APA

Pechenik, J. A. (2011). Biology of the invertebrates (Sixth edition, International edition.). McGraw-Hill Higher Education.

Dyfyniad Arddull Chicago

Pechenik, Jan A. Biology of the Invertebrates. Sixth edition, International edition. New York: McGraw-Hill Higher Education, 2011.

Dyfyniad MLA

Pechenik, Jan A. Biology of the Invertebrates. Sixth edition, International edition. McGraw-Hill Higher Education, 2011.

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