Van der Ryn, S. (1978). The toilet papers: Designs to recycle human waste and water: dry toilets, greywater systems, & urban sewage. Capra Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVan der Ryn, Sim. The Toilet Papers: Designs to Recycle Human Waste and Water: Dry Toilets, Greywater Systems, & Urban Sewage. Santa Barbara, [U.S.A.]: Capra Press, 1978.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVan der Ryn, Sim. The Toilet Papers: Designs to Recycle Human Waste and Water: Dry Toilets, Greywater Systems, & Urban Sewage. Capra Press, 1978.
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