Não informado. (1989). Minerals Industry International. Institution of Mining and Metallurgy.
Chicagoスタイル(17版)引用形式Não informado. Minerals Industry International. London: Institution of Mining and Metallurgy, 1989.
MLA(8版)引用形式Não informado. Minerals Industry International. Institution of Mining and Metallurgy, 1989.
警告: この引用は必ずしも正確ではありません.