International Tunnelling Association. (1981). Advances in Tunnelling Technology and Subsurface Use. Pergamon Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Tunnelling Association. Advances in Tunnelling Technology and Subsurface Use. Oxford, Inglaterra: Pergamon Press, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रInternational Tunnelling Association. Advances in Tunnelling Technology and Subsurface Use. Pergamon Press, 1981.
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