(1981). U.S. trade with Puerto Rico and U.S. possessions: August 1981. U.S. Department of Commerce.
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Citação norma Chicago
U.S. Trade with Puerto Rico and U.S. Possessions: August 1981. Washington: U.S. Department of Commerce, 1981.
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Citação norma MLA
U.S. Trade with Puerto Rico and U.S. Possessions: August 1981. U.S. Department of Commerce, 1981.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.