Hay, J. (2007). In defense of nature (1st University of Iowa Press ed.). University of Iowa Press.
Citace podle Chicago (17th ed.)Hay, John. In Defense of Nature. 1st University of Iowa Press ed. Iowa City: University of Iowa Press, 2007.
Citace podle MLA (9th ed.)Hay, John. In Defense of Nature. 1st University of Iowa Press ed. University of Iowa Press, 2007.
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