Tyler, J. W. (1979). TRRL quiet vehicle programme: Quiet heavy vehicle (QHV) project. Transport and Road Research Laboratory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTyler, J. W. TRRL Quiet Vehicle Programme: Quiet Heavy Vehicle (QHV) Project. Crowthorne, Berk: Transport and Road Research Laboratory, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTyler, J. W. TRRL Quiet Vehicle Programme: Quiet Heavy Vehicle (QHV) Project. Transport and Road Research Laboratory, 1979.
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