APA aipamena

(2006). Countries of the world and their leaders yearbook, 2007. Farmington Hills, Mich: Gale Group.

Chicago Style aipamena

Countries of the World and Their Leaders Yearbook, 2007. Farmington Hills, Mich: Gale Group, 2006.

MLA aipamena

Countries of the World and Their Leaders Yearbook, 2007. Farmington Hills, Mich: Gale Group, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.