Não informado. (1947). Information Circular. State of California, Department of Natural Resources, Division of Mines.
Cita Chicago Style (17a ed.)Não informado. Information Circular. San Francisco, Calif: State of California, Department of Natural Resources, Division of Mines, 1947.
Cita MLA (8a ed.)Não informado. Information Circular. State of California, Department of Natural Resources, Division of Mines, 1947.
Precaución: Estas citas no son 100% exactas.