O'Brien, K. J. (2010). An ethics of biodiversity: Christianity, ecology, and the variety of life. Georgetown University Press.
Chicago-viite (17. p.)O'Brien, Kevin J. An Ethics of Biodiversity: Christianity, Ecology, and the Variety of Life. Washington, D.C.: Georgetown University Press, 2010.
MLA-viite (9. p.)O'Brien, Kevin J. An Ethics of Biodiversity: Christianity, Ecology, and the Variety of Life. Georgetown University Press, 2010.
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