APA aipamena

(2004). The World Almanac and book of facts 2004. World Almanac Books.

Chicago Style aipamena

The World Almanac and Book of Facts 2004. World Almanac Books, 2004.

MLA aipamena

The World Almanac and Book of Facts 2004. World Almanac Books, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.