Não informado. (2011). Annual Bulletin of Exports of Chemical Products. United Nations, Economic Commission for Europe.
Chicagoスタイル(17版)引用形式Não informado. Annual Bulletin of Exports of Chemical Products. New York: United Nations, Economic Commission for Europe, 2011.
MLA(8版)引用形式Não informado. Annual Bulletin of Exports of Chemical Products. United Nations, Economic Commission for Europe, 2011.
警告: この引用は必ずしも正確ではありません.