Botkin, D. B., & Keller, E. A. (2012). Environmental science: International student version (8th ed.). Wiley.
Čikaški stil citiranja (17. izdanje)Botkin, Daniel B., i Edward A. Keller. Environmental Science: International Student Version. 8th ed. Hoboken, NJ ; New Delhi: Wiley, 2012.
MLA način citiranja (8. izdanje)Botkin, Daniel B., i Edward A. Keller. Environmental Science: International Student Version. 8th ed. Wiley, 2012.
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