(2001). The world almanac and book of facts 2001. World Almanac Books.
Chicago Style (17th ed.) CitationThe World Almanac and Book of Facts 2001. New Jersey: World Almanac Books, 2001.
MLA引文The World Almanac and Book of Facts 2001. World Almanac Books, 2001.
警告:這些引文格式不一定是100%准確.