APA (7th ed.) Zitazioa
Enger, E. D., & Smith, B. F. (2010). Environmental science: A study of interrelationships (12th ed.). McGraw-Hill.
Chicago Style (17th ed.) Zitazioa
Enger, Eldon D., eta Bradley F. Smith. Environmental Science: A Study of Interrelationships. 12th ed. Boston: McGraw-Hill, 2010.
MLA (9th ed.) Zitazioa
Enger, Eldon D., eta Bradley F. Smith. Environmental Science: A Study of Interrelationships. 12th ed. McGraw-Hill, 2010.
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