John Muir Institute for Environmental Studies and University of New Mexico. (1979). Environmental Ethics. Environmental Philosophy.
Citace podle Chicago (17th ed.)John Muir Institute for Environmental Studies and University of New Mexico. Environmental Ethics. Denton, Tex: Environmental Philosophy, 1979.
Citace podle MLA (8th ed.)John Muir Institute for Environmental Studies and University of New Mexico. Environmental Ethics. Environmental Philosophy, 1979.
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