Johnson, G. B. 1. (2010). Essentials of the living world (3rd ed.). Dubuque, IA: McGraw-Hill.
Trích dẫn kiểu ChicagoJohnson, George B. 1942-. Essentials of the Living World. 3rd ed. Dubuque, IA: McGraw-Hill, 2010.
MLA CitationJohnson, George B. 1942-. Essentials of the Living World. 3rd ed. Dubuque, IA: McGraw-Hill, 2010.
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