Shepherd, R. (2002). Structures of our time: 31 buildings that changed modern life. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रShepherd, Roger. Structures of Our Time: 31 Buildings That Changed Modern Life. New York: McGraw-Hill, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रShepherd, Roger. Structures of Our Time: 31 Buildings That Changed Modern Life. McGraw-Hill, 2002.
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