APA (7e ed.) Bronvermelding

Cunningham, W. P., & Cunningham, M. A. (2012). Environmental science: A global concern (12th ed.). McGraw-Hill Companies, Inc.

Chicago (17e ed.) Bronvermelding

Cunningham, William P., en Mary Ann Cunningham. Environmental Science: A Global Concern. 12th ed. New York: McGraw-Hill Companies, Inc, 2012.

MLA (9e ed.) Bronvermelding

Cunningham, William P., en Mary Ann Cunningham. Environmental Science: A Global Concern. 12th ed. McGraw-Hill Companies, Inc, 2012.