Não informado. (2000). Technical papers. U.S. Department of the Interior, Bureau of Mines.
Chicagoスタイル(17版)引用形式Não informado. Technical Papers. Washington: U.S. Department of the Interior, Bureau of Mines, 2000.
MLA(8版)引用形式Não informado. Technical Papers. U.S. Department of the Interior, Bureau of Mines, 2000.
警告: この引用は必ずしも正確ではありません.