Citazione Stile APA (7a Edizione)

Cunningham, W. P. (2003). Environmental science: A global concern. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Cunningham, William P. Environmental Science: A Global Concern. New York: McGraw-Hill, 2003.

Citatione MLA (9a ed.)

Cunningham, William P. Environmental Science: A Global Concern. McGraw-Hill, 2003.