APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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