Society for American Archaeology. Meeting (27th : 1982 : Minneapolis, Minn.), & Torrence, R. (1989). Time, energy, and stone tools. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSociety for American Archaeology. Meeting (27th : 1982 : Minneapolis, Minn.), और Robin Torrence. Time, Energy, and Stone Tools. Cambridge: Cambridge University Press, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSociety for American Archaeology. Meeting (27th : 1982 : Minneapolis, Minn.), और Robin Torrence. Time, Energy, and Stone Tools. Cambridge University Press, 1989.
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