APA (7e ed.) Bronvermelding

Cunningham, W. P., Cunningham , M. A., & Woodworth , B. (2003). Environmental science: A global concern (7th ed.). McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Cunningham, William P., Mary Ann Cunningham , en Barbara Woodworth. Environmental Science: A Global Concern. 7th ed. New York: McGraw-Hill, 2003.

MLA (9e ed.) Bronvermelding

Cunningham, William P., et al. Environmental Science: A Global Concern. 7th ed. McGraw-Hill, 2003.