APA (7th ed.) Citation

Liu, M. L. . [., & Janssen, S.. (2010). The World almanac and book of facts 2010. World Almanac Books.

Chicago Style (17th ed.) Citation

Liu, M. L. [], and Sarah Janssen. The World Almanac and Book of Facts 2010. New York: World Almanac Books, 2010.

MLA (9th ed.) Citation

Liu, M. L. [], and Sarah Janssen. The World Almanac and Book of Facts 2010. World Almanac Books, 2010.

Warning: These citations may not always be 100% accurate.