United Nations. office of Public Information. (1965). Landmarks in international co-operation. New York: United Nations.
Trích dẫn kiểu ChicagoUnited Nations. office of Public Information. Landmarks in International Co-operation. New York: United Nations, 1965.
MLA citiranjeUnited Nations. office of Public Information. Landmarks in International Co-operation. New York: United Nations, 1965.
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