Organizacja Narodów Zjednoczonych. Economic Commission for Europe. Statistical Division. (2007). UNECE Countries in Figures. United Nations.
Citazione stile Chigago Style (17a edizione)Organizacja Narodów Zjednoczonych. Economic Commission for Europe. Statistical Division. UNECE Countries in Figures. New York ; Geneva: United Nations, 2007.
Citatione MLA (9a ed.)Organizacja Narodów Zjednoczonych. Economic Commission for Europe. Statistical Division. UNECE Countries in Figures. United Nations, 2007.
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