Não informado. (1990). Metals & Minerals Annual Review. Mining Journal.
Chicagoスタイル(17版)引用形式Não informado. Metals & Minerals Annual Review. London: Mining Journal, 1990.
MLA(8版)引用形式Não informado. Metals & Minerals Annual Review. Mining Journal, 1990.
警告: この引用は必ずしも正確ではありません.