- ^ Sow, Alfa I., and Mohamed H. Abdulaziz, "Language and Social Change," Ch. 18 in Ali A. Mazrui (ed.) Africa Since 1935 (UNESCO General History of Africa, Vol. 8). University of California Press, 1993. P. 527.
- ^ 与现时的标准字型Ɓ不同
- Coulmas, Florian, The Blackwell Encyclopedia of Writing Systems, 1996, Blackwell, Oxford
- IIACL, Practical Orthography of African Languages (页面存档备份,存于互联网档案馆), Revised Edition, London: Oxford University Press, 1930
- Sow, Alfa I., and Mohamed H. Abdulaziz, "Language and Social Change," Ch. 18 in Ali A. Mazrui (ed.) Africa Since 1935 (UNESCO General History of Africa, Vol. 8). University of California Press, 1993.