1Aldo Leopold, A Sand County Almanac : And Scketches Here and There, (New York: Oxford University Press, 1949).
2Arne Naess, " The Shallow and the Deep, Long- Range Ecological Movement" , Inquiryl 6 ( spring 1973 ).
3Arne Naess, "Identification as a Source of Deep Ecological Attitudes", Louis P. Pojman and Paul Pojman, ed. Environmental Ethics: Readings In Theory And Applications (Thomson, 2008).
4Bill Devall and George Sessions, "Deep Ecology" Louis P. Pojman and Paul Pojman , ed. Environmental Ethics : Readings In Theory And Applications (Thomson, 2008).
5Holmes Rolston Ⅲ, “Naqturalizing Values: Organisms and Species”, Louis P. Pojman and Paul Pojman, ed. Environmental Ethics : Readings In Theory And Applications (Thomson, 2008).
