United Nations Industrial Development Organization. (1972). Information sources on the leather and leather goods industry. United Nations.
芝加哥风格引文United Nations Industrial Development Organization. Information Sources on the Leather and Leather Goods Industry. New York: United Nations, 1972.
MLA引文United Nations Industrial Development Organization. Information Sources on the Leather and Leather Goods Industry. United Nations, 1972.
警告：这些引文格式不一定是100％准确.