Lupton, G. N. (1981). Generating colour shaded images by computer: VIGIL, an aid to highway design. Transport and Road Research Laboratory.
Chicago Style (17th ed.) CitationLupton, G. N. Generating Colour Shaded Images by Computer: VIGIL, an Aid to Highway Design. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1981.
MLA (9th ed.) CitationLupton, G. N. Generating Colour Shaded Images by Computer: VIGIL, an Aid to Highway Design. Transport and Road Research Laboratory, 1981.
Warning: These citations may not always be 100% accurate.