(1983). Annual bulletin of general energy statistics for Europe 1981. United Nations.
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Citação norma Chicago
Annual Bulletin of General Energy Statistics for Europe 1981. New York: United Nations, 1983.
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Citação norma MLA
Annual Bulletin of General Energy Statistics for Europe 1981. United Nations, 1983.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.