Wolfskill, L. A. (1963). Handbook of building homes of the earth. Texas Transportation Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWolfskill, Lyle A. Handbook of Building Homes of the Earth. College Station: Texas Transportation Institute, 1963.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWolfskill, Lyle A. Handbook of Building Homes of the Earth. Texas Transportation Institute, 1963.
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