Wilkins, H. A., & Riley, B. S. (1982). The road grip of commercial vehicle tyres. Transport and Road Research Laboratory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilkins, H. A., और B. S. Riley. The Road Grip of Commercial Vehicle Tyres. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWilkins, H. A., और B. S. Riley. The Road Grip of Commercial Vehicle Tyres. Transport and Road Research Laboratory, 1982.
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