Sheppard, D. (1982). The availability of books on driving. Transport and Road Research Laboratory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSheppard, D. The Availability of Books on Driving. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSheppard, D. The Availability of Books on Driving. Transport and Road Research Laboratory, 1982.
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