Seligman, C.G., author
Races of Africa
Thornton Butterworth, 1939
 Buku Teks
Fage, J.D., author
A history of Africa
Routledge, 1995
 Buku Teks
Contemporary Africa
edited by Bisheshwar Prasad
Asia Public House, 1960
 Buku Teks
Schatten, Fritz, author
Communism in Africa
Frederick A. Praeger, 1966
 Buku Teks
Africa yesterday and today / edited by Clark D. Moore and Ann Dunbar
Bantam Books, 1968
 Buku Teks
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