Gorke, M. (2003). The death of our planet's species: A challenge to ecology and ethics. Island Press.
Chicago-viite (17. p.)Gorke, Martin. The Death of Our Planet's Species: A Challenge to Ecology and Ethics. Washington: Island Press, 2003.
MLA-viite (9. p.)Gorke, Martin. The Death of Our Planet's Species: A Challenge to Ecology and Ethics. Island Press, 2003.
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