APA aipamena

(2004). The world almanac and book of facts 2004. U.S.A: World Almanac Books.

Chicago Style aipamena

The World Almanac and Book of Facts 2004. U.S.A: World Almanac Books, 2004.

MLA aipamena

The World Almanac and Book of Facts 2004. U.S.A: World Almanac Books, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.