*Ladefoged, Peter; Ruth Glick; Clive Criper; Clifford H. Prator; Livingstone Walusimbi (1972) "Language in Uganda" (Ford Foundation language surveys vol.
* Ladefoged, Peter; Ruth Glick; Clive Criper; Clifford H. Prator; Livingstone Walusimbi (1972) "Language in Uganda" (Ford Foundation language surveys vol.