Dokumentuaren aipamena

APA (7th ed.) Zitazioa
Enger, E. D., & Smith, B. F. (1992). Environmental science: A study of interrelationships (4th ed.). W.C. Brown.
Chicago Style (17th ed.) Zitazioa
Enger, Eldon D., eta Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 4th ed. Dubuque, IA: W.C. Brown, 1992.
MLA (9th ed.) Zitazioa
Enger, Eldon D., eta Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 4th ed. W.C. Brown, 1992.
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