World Almanac Books. (2006). The world almanac and book of facts 2006. World Almanac Books.
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芝加哥风格引文
World Almanac Books. The World Almanac and Book of Facts 2006. New York: World Almanac Books, 2006.
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MLA引文
World Almanac Books. The World Almanac and Book of Facts 2006. World Almanac Books, 2006.
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警告：这些引文格式不一定是100％准确.