Tunbridge, R. J., & Jackson, R. L. (1980). The economics of stage carriage operation by private bus and coach companies. Transport and Road Research Laboratory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTunbridge, R. J., और R. L. Jackson. The Economics of Stage Carriage Operation by Private Bus and Coach Companies. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1980.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTunbridge, R. J., और R. L. Jackson. The Economics of Stage Carriage Operation by Private Bus and Coach Companies. Transport and Road Research Laboratory, 1980.
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