Citazione Stile APA (7a Edizione)

Enger, E. D., & Smith , B. F. (2004). Environmental Science : a study of: Interrelationships (9th ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Enger, Eldon D., e Bradley F. Smith. Environmental Science : a Study of: Interrelationships. 9th ed. Boston: McGraw-Hill, 2004.

Citatione MLA (9a ed.)

Enger, Eldon D., e Bradley F. Smith. Environmental Science : a Study of: Interrelationships. 9th ed. McGraw-Hill, 2004.