United Nations Industrial Development Organization. (1977). Information sources on the iron and steel industry. United Nations.
Chicagoスタイル(17版)引用形式United Nations Industrial Development Organization. Information Sources on the Iron and Steel Industry. New York: United Nations, 1977.
MLA(9版)引用形式United Nations Industrial Development Organization. Information Sources on the Iron and Steel Industry. United Nations, 1977.
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