Sheperd, R. (2002). Structures of our time31 buildings that changed modern life2002. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSheperd, Roger. Structures of Our Time31 Buildings That Changed Modern Life2002. McGraw-Hill, 2002.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSheperd, Roger. Structures of Our Time31 Buildings That Changed Modern Life2002. McGraw-Hill, 2002.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.