Não informado. (1986). Civil Engineering Practice. Boston Society of Civil Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Civil Engineering Practice. Boston, Mass: Boston Society of Civil Engineers, 1986.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Civil Engineering Practice. Boston Society of Civil Engineers, 1986.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.