1. Chabata, E. (2007). The Nambya verb with special emphasis on the causative. Unpublished doctoral thesis. Department of Linguistics and Scandinavian Studies, University of Oslo, Oslo.
2. Doke, C. (1931). A comparative study of Shona phonetics. Johannesburg: University of the Witwatersrand University Press.
3. Fortune, G. (1967). Elements of Shona. Salisbury: Longmans of Rhodesia Pvt Limited.
4. Guthrie, M. (1948). The classification of Bantu languages. London: Oxford University Press.
5. Hachipola, S. J. (1998). A survey of minority languages of Zimbabwe. Harare: University of Zimbabwe publications.