Não informado. (1936). Bulletin of the Iron and Steel Institute. Iron and Steel Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Iron and Steel Institute. London: Iron and Steel Institute, 1936.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the Iron and Steel Institute. Iron and Steel Institute, 1936.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.