Hughes, D. J. (2009). An environmental history of the world: Humankind's changing role in the community of life (Second edition.). AUWSF (018249).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHughes, Donald J. An Environmental History of the World: Humankind's Changing Role in the Community of Life. Second edition. London: AUWSF (018249), 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHughes, Donald J. An Environmental History of the World: Humankind's Changing Role in the Community of Life. Second edition. AUWSF (018249), 2009.
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