Botzler, R. G., & Armstrong, S. J. (1998). Environmental ethics: Divergence and convergence (2nd ed.). McGraw-Hill.
Citace podle Chicago (17th ed.)Botzler, Richard George, a Susan J. Armstrong. Environmental Ethics: Divergence and Convergence. 2nd ed. Boston, Mass: McGraw-Hill, 1998.
Citace podle MLA (9th ed.)Botzler, Richard George, a Susan J. Armstrong. Environmental Ethics: Divergence and Convergence. 2nd ed. McGraw-Hill, 1998.
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