United Nations. Dept. of Public Information. (1990). The world economy: A global challenge. United Nations Dept. of Public Information.
芝加哥风格引文United Nations. Dept. of Public Information. The World Economy: A Global Challenge. New York: United Nations Dept. of Public Information, 1990.
MLA引文United Nations. Dept. of Public Information. The World Economy: A Global Challenge. United Nations Dept. of Public Information, 1990.
警告：这些引文格式不一定是100％准确.