APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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