APA
(1993). Africa Index. [S.L.]: United Nations Econmic Commission for Africa.
Chicago
1993. Africa Index. [S.L.]: United Nations Econmic Commission for Africa.
Harvard
(1993). Africa Index. [S.L.]: United Nations Econmic Commission for Africa.
MLA
Africa Index. [S.L.]: United Nations Econmic Commission for Africa. 1993.