APA (7th ed.) Citation
Enger, E. D., & Smith, B. F. (1991). Enviromental science: A study of interrelationships (4th ed.). Wm.C.Brown.
Chicago Style (17th ed.) Citation
Enger, Eldon D., and Bradley F. Smith. Enviromental Science: A Study of Interrelationships. 4th ed. Michigan: Wm.C.Brown, 1991.
MLA (9th ed.) Citation
Enger, Eldon D., and Bradley F. Smith. Enviromental Science: A Study of Interrelationships. 4th ed. Wm.C.Brown, 1991.
Warning: These citations may not always be 100% accurate.