Coughlan, Robert
Tropical Africa
Time Incorporated, 1962
 Buku Teks
The population of tropical Africa
edited by John C. Caldwell and Chukuka Okonjo
Longmans, Green, 1968
 Buku Teks SO
Marcus, Edward
Investment and development possibilities in tropical Africa
Bookman Associates, 1960
 Buku Teks
Due, John F.
Taxation and economic development in tropical Africa
MIT Press, 1963
 Buku Teks
Political parties and national integration in tropical Africa /edited by James Smoot Coleman
University of California Press, 1966
 Buku Teks