Não informado. (1947). Information Circular. State of California, Department of Natural Resources, Division of Mines.
Chicagoスタイル(17版)引用形式Não informado. Information Circular. San Francisco, Calif: State of California, Department of Natural Resources, Division of Mines, 1947.
MLA(8版)引用形式Não informado. Information Circular. State of California, Department of Natural Resources, Division of Mines, 1947.
警告: この引用は必ずしも正確ではありません.