Dyfyniad APA

Cunningham, W. P., & Cunningham, M. A. (2015). Environmental science: A global concern (Thirteenth edition.). McGraw-Hill Education.

Dyfyniad Arddull Chicago

Cunningham, William P., and Mary Ann Cunningham. Environmental Science: A Global Concern. Thirteenth edition. New York, NY: McGraw-Hill Education, 2015.

Dyfyniad MLA

Cunningham, William P., and Mary Ann Cunningham. Environmental Science: A Global Concern. Thirteenth edition. McGraw-Hill Education, 2015.

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