434607 Billington, D. P. (1983). The tower and the bridge: The new art of structural engineering. New York : Basic Bks..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र434607 Billington, David P. The Tower and the Bridge: The New Art of Structural Engineering. New York : Basic Bks., 1983.
एमएलए (9वां संस्करण) प्रशस्ति पत्र434607 Billington, David P. The Tower and the Bridge: The New Art of Structural Engineering. New York : Basic Bks., 1983.
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