Citazione Stile APA (7a Edizione)

Cunningham, W. P., & Cunningham , M. A. (2004). Principles of environmental science : inquiry and: Applications (2nd ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Cunningham, William P., e Mary Ann Cunningham. Principles of Environmental Science : Inquiry and: Applications. 2nd ed. Boston: McGraw-Hill, 2004.

Citatione MLA (9a ed.)

Cunningham, William P., e Mary Ann Cunningham. Principles of Environmental Science : Inquiry and: Applications. 2nd ed. McGraw-Hill, 2004.