Cunningham, W. P., & Cunningham, M. A. (2013). Principles of environmental science: Inquiry & applications (7th ed.). McGraw-Hill.
Citace podle Chicago (17th ed.)Cunningham, William P., a Mary Ann Cunningham. Principles of Environmental Science: Inquiry & Applications. 7th ed. New York, NY: McGraw-Hill, 2013.
Citace podle MLA (9th ed.)Cunningham, William P., a Mary Ann Cunningham. Principles of Environmental Science: Inquiry & Applications. 7th ed. McGraw-Hill, 2013.
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