O'Rourke, T. D., Priest, S. D., & New, B. M. (1979). Some observations of machine tunnelling at the Kielder Aqueduct. Transport and Road Research Laboratory.
Chicago Style (17th ed.) CitationO'Rourke, T. D., S. D. Priest, and B. M. New. Some Observations of Machine Tunnelling at the Kielder Aqueduct. Crowthorne, Berk: Transport and Road Research Laboratory, 1979.
MLA (9th ed.) CitationO'Rourke, T. D., et al. Some Observations of Machine Tunnelling at the Kielder Aqueduct. Transport and Road Research Laboratory, 1979.
Warning: These citations may not always be 100% accurate.