Waltner-Toews, D. (2013). The origin of feces: What excrement tells us about evolution, ecology, and a sustainable society. ECW Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWaltner-Toews, David. The Origin of Feces: What Excrement Tells Us About Evolution, Ecology, and a Sustainable Society. Toronto: ECW Press, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWaltner-Toews, David. The Origin of Feces: What Excrement Tells Us About Evolution, Ecology, and a Sustainable Society. ECW Press, 2013.
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