APA (7th ed.) Citation

(2012). The World almanac and book of facts: 2012. World Almanac Books.

Chicago Style (17th ed.) Citation

The World Almanac and Book of Facts: 2012. New York, New York: World Almanac Books, 2012.

MLA (9th ed.) Citation

The World Almanac and Book of Facts: 2012. World Almanac Books, 2012.