Não informado. (1919). Mining and Metallurgy. American Institute of Mining and Metallurgical Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Mining and Metallurgy. New York: American Institute of Mining and Metallurgical Engineers, 1919.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Mining and Metallurgy. American Institute of Mining and Metallurgical Engineers, 1919.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.