July, Robert W
A history of the African people
Charles Scribner's, 1970
 Buku Teks SO
Spinage, Clive A.
African ecology - benchmarks and historical perspectives
Springer, 2012
 eBooks
Fage, J.D.
A history of Africa
Routledge, 1995
 Buku Teks SO
Contemporary Africa
edited by Bisheshwar Prasad
Asia Public House, 1960
 Buku Teks SO
Cook, Arthur N.
Africa : past and present
Littlefield Adams, 1969
 Buku Teks SO