Não informado. (2002). California Journal of Mines and Geology. State of California, Department of Natural Resources, Division of Mines.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. California Journal of Mines and Geology. San Francisco, Calif: State of California, Department of Natural Resources, Division of Mines, 2002.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. California Journal of Mines and Geology. State of California, Department of Natural Resources, Division of Mines, 2002.
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