(1980). Annual bulletin of trade in chemical products 1979. United Nations.
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Citação norma Chicago
Annual Bulletin of Trade in Chemical Products 1979. New York: United Nations, 1980.
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Citação norma MLA
Annual Bulletin of Trade in Chemical Products 1979. United Nations, 1980.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.