Cita APA
(2006). The World almanac and book of facts. 2006. World Almanac Books.
Citación estilo Chicago
The World Almanac and Book of Facts. 2006. New York: World Almanac Books, 2006.
Cita MLA
The World Almanac and Book of Facts. 2006. World Almanac Books, 2006.
Warning: These citations may not always be 100% accurate.