World Almanac Education Group. (2005). The World almanac and book of facts 2005 (Primera edición.). World Almanac Education Group.
Citazione stile Chigago Style (17a edizione)World Almanac Education Group. The World Almanac and Book of Facts 2005. Primera edición. Nueva York: World Almanac Education Group, 2005.
Citatione MLA (8a ed.)World Almanac Education Group. The World Almanac and Book of Facts 2005. Primera edición. World Almanac Education Group, 2005.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.