Botkin, D. B., & Keller, E. A. (2003). Environmental science: Earth as a living planet (Forth edition.). Wiley.
Čikaški stil citiranja (17. izdanje)Botkin, Daniel B., i Edward A. Keller. Environmental Science: Earth as a Living Planet. Forth edition. New York: Wiley, 2003.
MLA način citiranja (8. izdanje)Botkin, Daniel B., i Edward A. Keller. Environmental Science: Earth as a Living Planet. Forth edition. Wiley, 2003.
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