ASHLEY, C. (1994). Traffic And Highway Engineering For Developments Carol Ashley. Balcwell Scientific Publicatio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रASHLEY, Carol. Traffic And Highway Engineering For Developments Carol Ashley. Balcwell Scientific Publicatio, 1994.
एमएलए (8वां संस्करण) प्रशस्ति पत्रASHLEY, Carol. Traffic And Highway Engineering For Developments Carol Ashley. Balcwell Scientific Publicatio, 1994.
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