APA (7th ed.) Citation

Enger, E. D., & Smith, B. F. (2000). Environmental science: A study of interrelationships (7th ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Enger, Eldon D., and Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 7th ed. Boston, Mass: McGraw-Hill, 2000.

MLA (9th ed.) Citation

Enger, Eldon D., and Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 7th ed. McGraw-Hill, 2000.