Ward, P. D. (2009). The medea hypothesis: Is life on earth ultimately self-destructive? Princeton University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWard, Peter Douglas. The Medea Hypothesis: Is Life on Earth Ultimately Self-destructive? Princeton: Princeton University Press, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWard, Peter Douglas. The Medea Hypothesis: Is Life on Earth Ultimately Self-destructive? Princeton University Press, 2009.
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