Challenger, M. (2012). On extinction: How we became estranged from nature. Counterpoint : Distributed by Publishers Group West.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रChallenger, Melanie. On Extinction: How We Became Estranged from Nature. Berkeley, CA: Counterpoint : Distributed by Publishers Group West, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रChallenger, Melanie. On Extinction: How We Became Estranged from Nature. Counterpoint : Distributed by Publishers Group West, 2012.
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