United States. Bonneville Power Administration. (1939). Pacific Northwest mineral occurrences: August, 1939. U.S. Dept. of the Interior.
Cita Chicago Style (17a ed.)United States. Bonneville Power Administration. Pacific Northwest Mineral Occurrences: August, 1939. Washington, D.C.: U.S. Dept. of the Interior, 1939.
Cita MLA (8a ed.)United States. Bonneville Power Administration. Pacific Northwest Mineral Occurrences: August, 1939. U.S. Dept. of the Interior, 1939.
Precaución: Estas citas no son 100% exactas.