[1] Subregional Office for Education in Southern Africa and W. Makulumiza and H. Gonthi, "Renewable energy uses ," UNESCO Subregional Office for Education in Southern Africa/African Publishers' Network, 1999.

Subregional Office for Education in Southern Africa and Makulumiza, Wilson Nkhoma and Gonthi, Harold Frank, "Renewable energy uses ," UNESCO Subregional Office for Education in Southern Africa/African Publishers' Network, 1999.

Subregional Office for Education in Southern Africa, Makulumiza, W., Gonthi, H., (1999). "Renewable energy uses," UNESCO Subregional Office for Education in Southern Africa/African Publishers' Network.

Subregional Office for Education in Southern Africa, Makulumiza, Wilson Nkhoma, Gonthi, Harold Frank. (1999). "Renewable energy uses," UNESCO Subregional Office for Education in Southern Africa/African Publishers' Network.