APA (7th ed.) Citation

Enger, E. D., & Smith, B. F. (1992). Environmental science: A study of interrelationships (Fourth edition.). Wm. C. Brown.

Chicago Style (17th ed.) Citation

Enger, Eldon D., and Bradley F. Smith. Environmental Science: A Study of Interrelationships. Fourth edition. Dubuque, Iowa: Wm. C. Brown, 1992.

MLA (9th ed.) Citation

Enger, Eldon D., and Bradley F. Smith. Environmental Science: A Study of Interrelationships. Fourth edition. Wm. C. Brown, 1992.