Callenbach, E. (2008). Ecology: A pocket guide (Rev. ed., 10th anniversary ed.). University of California Press.
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Chicago-čujuhus (17. p.)
Callenbach, Ernest. Ecology: A Pocket Guide. Rev. ed., 10th anniversary ed. Berkeley: University of California Press, 2008.
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MLA-čujuhus (9. p.)
Callenbach, Ernest. Ecology: A Pocket Guide. Rev. ed., 10th anniversary ed. University of California Press, 2008.
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