References
- Baird Callicott, J. (1989). In Defence of the Land Ethic, State University of New York Press; 30.Midgley, M. (1994). Beastly Beliefs. “Nature” 368.
- Browning Cole, E. (1993). Philosophy and Feminist Criticism. Paragon House.
- Dawkins, R. (1995). River Out of Eden, Harper and Collins.
- Johnson, L. (1991). A Morally Deep World: An Essay on Moral Significance and Environmental Ethics, Cambridge University Press.
- Lovelock, J. (1995). The Ages of Gaia. Oxford: Oxford University Press.
- May, R. (1994). The Fire This Time: Biological Diversity Yesterday, Today and Tomorrow, in “The Origin of Species”, Green College Lectures.
- Midgley, M. (1994). Beastly Beliefs - “Nature” 368
- Singer, P. (1973). Animal Liberation. “The New York Review of Books”.
- Vitonsek, P., Erlich, P. R., Erlich, A. H. and Maison, P. A (1986). Human Appropriation of the Products of Photosynthesis. “Bioscience” 36; 368–73.