Farmer, I. W. (1987). Some considerations affecting the selection of tunnelling methods. Ground Engineering Division, Structures Group, Transport and Road Research Laboratory.
Chicago Style (17th ed.) CitationFarmer, I. W. Some Considerations Affecting the Selection of Tunnelling Methods. Crowthorne, Berkshire: Ground Engineering Division, Structures Group, Transport and Road Research Laboratory, 1987.
MLA (9th ed.) CitationFarmer, I. W. Some Considerations Affecting the Selection of Tunnelling Methods. Ground Engineering Division, Structures Group, Transport and Road Research Laboratory, 1987.
Warning: These citations may not always be 100% accurate.