By Kapuscinski, Ryszard
By Lindqvist, Sven
By Macgaffey, Professor Janet, Bazenguissa-Ganga, Remy
By International African Institute, Baker, Philip
By Collins, Robert O.
By Rooney, David
By Griffiths, Ieuan L.L.
By Mazrui, Ali A.
By Brooke-Smith, Robin
By Fage, J., Oliver, Roland
By Crowley, Roger
By Mbiti, John S.
By World Bank
By Richard Dowden
By Walvin, James
By Tarrosy, Istvan, Szabó, Lorand, Hyden, Goran
By Williams, Susan
By Gerner, Deborah J.
By Omer-Cooper, J.D., etc., Afigbo, A.E.
By Spring, Chris
By Leys, Colin, Saul, John S
By Harlow, Barbara, Carter, Mia
By Davidson, Basil, Bauh, F.K.
By Malcioln, Jose V
By Appiah, Kwame Anthony
By Thomas A. Hale
By Grant, Michael
By Coquery–vidra
By Gilbert, Erik