APA aipamena

(2004). The world almanac and book of facts 2004. New York: World Almanac books.

Chicago Style aipamena

The World Almanac and Book of Facts 2004. New York: World Almanac books, 2004.

MLA aipamena

The World Almanac and Book of Facts 2004. New York: World Almanac books, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.