Não informado. (2011). Annual Bulletin of Exports of Chemical Products. United Nations, Economic Commission for Europe.
Čikaški stil citiranja (17. izdanje)Não informado. Annual Bulletin of Exports of Chemical Products. New York: United Nations, Economic Commission for Europe, 2011.
MLA način citiranja (8. izdanje)Não informado. Annual Bulletin of Exports of Chemical Products. United Nations, Economic Commission for Europe, 2011.
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