Sabey, B. E. (1980). Road safety and value for money. Transport and Road Research Laboratory, Accident Investigation Division.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSabey, Barbara E. Road Safety and Value for Money. Crowthorne, Berk: Transport and Road Research Laboratory, Accident Investigation Division, 1980.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSabey, Barbara E. Road Safety and Value for Money. Transport and Road Research Laboratory, Accident Investigation Division, 1980.
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