Não informado. (1993). New Steel Construction. British Constructional Steelwork Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. New Steel Construction. Birmingham, Inglaterra: British Constructional Steelwork Association, 1993.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. New Steel Construction. British Constructional Steelwork Association, 1993.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.