Ehret, Christopher. 2006. The Nilo-Saharan background of Chadic 1 Ağustos 2019 tarihinde Wayback Machine sitesinde arşivlendi.. In P. Newman and L. M. Hyman (eds), West African linguistics: studies in honor of Russell G. Schuh, pp. 56-66. Studies in African Linguistics Suppl. 11. Columbus: Ohio University Press.
Ehret, Christopher. 2006. The Nilo-Saharan background of Chadic 1 Ağustos 2019 tarihinde Wayback Machine sitesinde arşivlendi.. In P. Newman and L. M. Hyman (eds), West African linguistics: studies in honor of Russell G. Schuh, pp. 56-66. Studies in African Linguistics Suppl. 11. Columbus: Ohio University Press.