Hay, W. W. (1961). An Introduction to tansportation engineering. John Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHay, William W. An Introduction to Tansportation Engineering. NewYork: John Wiley, 1961.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHay, William W. An Introduction to Tansportation Engineering. John Wiley, 1961.
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