United Nations. Statistical Office & International Monetary Fund. (1950). Direction of international trade. [s.n.].
Citazione stile Chigago Style (17a edizione)United Nations. Statistical Office e International Monetary Fund. Direction of International Trade. [New York]: [s.n.], 1950.
Citatione MLA (9a ed.)United Nations. Statistical Office e International Monetary Fund. Direction of International Trade. [s.n.], 1950.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.