Cook, C., & David Killingray. (1991). African political facts since 1945. Facts on File.
Citazione stile Chigago Style (17a edizione)Cook, Chris;, e David Killingray. African Political Facts Since 1945. New York: Facts on File, 1991.
Citatione MLA (9a ed.)Cook, Chris;, e David Killingray. African Political Facts Since 1945. Facts on File, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.