Cita APA

(2010). World Almanac and book of facts 2010. World Almanac Books.

Chicago Edition Citation

World Almanac and Book of Facts 2010. New York: World Almanac Books, 2010.

Cita MLA

World Almanac and Book of Facts 2010. World Almanac Books, 2010.

Atenció: Aquestes cites poden no estar 100% correctes.