HAY, W. W. (1977). An Introduction To Transportation Engeneering William W. Hay. John Wiley & Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHAY, William W. An Introduction To Transportation Engeneering William W. Hay. John Wiley & Sons, 1977.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHAY, William W. An Introduction To Transportation Engeneering William W. Hay. John Wiley & Sons, 1977.
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