Enger, E. D., & Smith, B. F. (2013). Environmental science: A study of interrelationships (Thirteenth edition.). McGraw-Hill.
Čikaški stil citiranja (17. izdanje)Enger, Eldon D., i Bradley F. Smith. Environmental Science: A Study of Interrelationships. Thirteenth edition. New York, NY: McGraw-Hill, 2013.
MLA način citiranja (9. izdanje)Enger, Eldon D., i Bradley F. Smith. Environmental Science: A Study of Interrelationships. Thirteenth edition. McGraw-Hill, 2013.
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