APA aipamena

(2007). The Americana Annual 2007The Encyclopedia of the Events of 2006, Yearbook of the encyclopedia Americana. The World Bank.

Chicago Style aipamena

The Americana Annual 2007The Encyclopedia of the Events of 2006, Yearbook of the Encyclopedia Americana. The World Bank, 2007.

MLA aipamena

The Americana Annual 2007The Encyclopedia of the Events of 2006, Yearbook of the Encyclopedia Americana. The World Bank, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.