Heath, W. (1980). Inexpensive aerial photography for highway engineering and traffic studies. Transport and Road Research Laboratory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHeath, W. Inexpensive Aerial Photography for Highway Engineering and Traffic Studies. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1980.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHeath, W. Inexpensive Aerial Photography for Highway Engineering and Traffic Studies. Transport and Road Research Laboratory, 1980.
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