Tal Tamari (1991). "The Development of Caste Systems in West Africa". The Journal of African History (Cambridge University Press) 32 (2): 221–250. JSTOR182616. doi:10.1017/s0021853700025718.
Tal Tamari (1991). "The Development of Caste Systems in West Africa". The Journal of African History (Cambridge University Press) 32 (2): 221–250. JSTOR182616. doi:10.1017/s0021853700025718.