1987 Statistical Yearbook Annuaire statistique. United Nations.
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Citação norma Chicago
1987 Statistical Yearbook Annuaire Statistique. New York: United Nations.
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Citação norma MLA
1987 Statistical Yearbook Annuaire Statistique. United Nations.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.