Não informado. (1915). Mining Congress Journal. American Mining Congress.
Chicagoスタイル(17版)引用形式Não informado. Mining Congress Journal. Washington: American Mining Congress, 1915.
MLA(8版)引用形式Não informado. Mining Congress Journal. American Mining Congress, 1915.
警告: この引用は必ずしも正確ではありません.