Frederick A. Praeger, 1964
Buku Teks
The American Society of African Culture, 1966
Buku Teks
Edie, Carlene J., author
Wadsworth/Thomson Learning, 2003
Buku Teks
Monga, Celestin, author
Lynne Rienner, 1996
Buku Teks
University of California Press, 1966
Buku Teks