Westview Press , 1990
Buku Teks
edited by Michael M. Horowitz and Thomas M. Painter
Westview Press, 1986
Buku Teks
Chambers, Robert, 1932-, author
The Scandinavian Institute of African Studies, 1974
Buku Teks
edited by David E. Long and Bernard Reich
Westview Press, 1986
Buku Teks
edited by David E. Long and Bernard Reich
Westview Press, 2002
Buku Teks