Wagner, T. (2005). Environmental scienceActive learning laboratories and applied problem setsTravis Wagner, Robert Sanfortd. John Wiley.
Čikaški stil citiranja (17. izdanje)Wagner, Travis. Environmental ScienceActive Learning Laboratories and Applied Problem SetsTravis Wagner, Robert Sanfortd. John Wiley, 2005.
MLA način citiranja (8. izdanje)Wagner, Travis. Environmental ScienceActive Learning Laboratories and Applied Problem SetsTravis Wagner, Robert Sanfortd. John Wiley, 2005.
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