APA Citatie

Enger, E. D., & Bradley F. Smith. (2004). Environmental science: A study of interrelationships (9 th ed.). McGraw Hill.

Chicago Style citaat

Enger, Eldon D., en Bradley F. Smith. Environmental Science: A Study of Interrelationships. 9 th ed. New York: McGraw Hill, 2004.

MLA citatie

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