Dokumentuaren aipamena

APA (7th ed.) Zitazioa
Enger, E. D., & Smith, B. F. (1991). Enviromental science: A study of interrelationships (4th ed.). Wm.C.Brown.
Chicago Style (17th ed.) Zitazioa
Enger, Eldon D., eta Bradley F. Smith. Enviromental Science: A Study of Interrelationships. 4th ed. Michigan: Wm.C.Brown, 1991.
MLA (9th ed.) Zitazioa
Enger, Eldon D., eta Bradley F. Smith. Enviromental Science: A Study of Interrelationships. 4th ed. Wm.C.Brown, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.