Sarah Janssen. (2008). The WORLD almanac and book of facts 2008. World Almanac Books.
芝加哥风格引文Sarah Janssen. The WORLD Almanac and Book of Facts 2008. World Almanac Books, 2008.
MLA引文Sarah Janssen. The WORLD Almanac and Book of Facts 2008. World Almanac Books, 2008.
警告：这些引文格式不一定是100％准确.