Coleman, James S.
Nigeria: background to nationalism
University of California Press, 1958
 Buku Teks
Bower, P. A.
Mining, commerce, and finance in nigeria / P.A. Bower
Faber and Faber Limited , 1948
 Buku Teks
Nigeria: options for long-term development: report of a mission sent to Nigeria / the World Bank , Wouter Tims
Johns Hopkins University Press , 1974
 Buku Teks
Lewis, William Arthur, 1915-
Reflection on Nigeria's economic growth
Development, 1966
 Buku Teks
Senelle, Robert
The Political, economic and social structures of Belgium / Robert Senelle
Ministry of Foreign Affairs and External Trade , 1979
 Buku Teks