APA (7 वां संस्करण) प्रशस्ति पत्र
Williams, G. C. (1996). Adaptation and natural selection: A critique of some current evolutionary thought. Princeton University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Williams, George Christopher. Adaptation and Natural Selection: A Critique of Some Current Evolutionary Thought. Princeton, N.J.: Princeton University Press, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Williams, George Christopher. Adaptation and Natural Selection: A Critique of Some Current Evolutionary Thought. Princeton University Press, 1996.
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