Coe, G. A., & Jackson, R. L. (1983). Developments in stage carriage bus fares before and after the Transport Act 1980. Transport and Road Research Laboratory.
Chicago-referens (17:e uppl.)Coe, G. A., och R. L. Jackson. Developments in Stage Carriage Bus Fares Before and After the Transport Act 1980. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1983.
MLA-referens (9:e uppl.)Coe, G. A., och R. L. Jackson. Developments in Stage Carriage Bus Fares Before and After the Transport Act 1980. Transport and Road Research Laboratory, 1983.
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