(2002). The world almanac and book of facts 2002. U.S.A: World Almanac Books.
Chicago Style aipamenaThe World Almanac and Book of Facts 2002. U.S.A: World Almanac Books, 2002.
MLA aipamenaThe World Almanac and Book of Facts 2002. U.S.A: World Almanac Books, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.