CUNNINGHAM, W. P. (2004). Principles of environmental science: Inquiry and applications. McGraw-Hill.
Chicago-referens (17:e uppl.)CUNNINGHAM, William P. Principles of Environmental Science: Inquiry and Applications. McGraw-Hill, 2004.
MLA-referens (9:e uppl.)CUNNINGHAM, William P. Principles of Environmental Science: Inquiry and Applications. McGraw-Hill, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.