Bly, P. H., Webster, F. V., & Pounds, S. (1980). Subsidisation of urban public transport. Transport and Road Research Laboratory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBly, P. H., F. V. Webster, और Susan Pounds. Subsidisation of Urban Public Transport. Crowthorne, [Eng.]: Transport and Road Research Laboratory, 1980.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBly, P. H., et al. Subsidisation of Urban Public Transport. Transport and Road Research Laboratory, 1980.
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