Não informado. (1971). Industrial Development Abstracts. United Nations, Industrial Development Organization.
Chicagoスタイル(17版)引用形式Não informado. Industrial Development Abstracts. New York: United Nations, Industrial Development Organization, 1971.
MLA(8版)引用形式Não informado. Industrial Development Abstracts. United Nations, Industrial Development Organization, 1971.
警告: この引用は必ずしも正確ではありません.