APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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