(1981). Yearbook of International Trade Statistics 1980 (1. ed.). United Nations.
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Citação norma Chicago
Yearbook of International Trade Statistics 1980. 1. ed. New York: United Nations, 1981.
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Citação norma MLA
Yearbook of International Trade Statistics 1980. 1. ed. United Nations, 1981.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.