Não informado. (2020). Bulletin of the American Institute of Mining Engineers. American Institute of Mining Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the American Institute of Mining Engineers. New York: American Institute of Mining Engineers, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the American Institute of Mining Engineers. American Institute of Mining Engineers, 2020.
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