Zimmerman, M. E. (1998). Environmental philosophy: From animal rights to radical ecology (2nd ed.). Prentice Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZimmerman, Michael E. Environmental Philosophy: From Animal Rights to Radical Ecology. 2nd ed. Upper Saddle River, N.J: Prentice Hall, 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रZimmerman, Michael E. Environmental Philosophy: From Animal Rights to Radical Ecology. 2nd ed. Prentice Hall, 1998.
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