Hammer, T. (1983). Wood for fuel: Energy crisis implying desertification, the case of Bara, the Sudan. Chr. Michelsen Institute, Development Research and Action Programme.
Lua i Stíl Chicago (17ú heag.)Hammer, Turi. Wood for Fuel: Energy Crisis Implying Desertification, the Case of Bara, the Sudan. Bergen, Norway: Chr. Michelsen Institute, Development Research and Action Programme, 1983.
Lua MLA (8ú heag.)Hammer, Turi. Wood for Fuel: Energy Crisis Implying Desertification, the Case of Bara, the Sudan. Chr. Michelsen Institute, Development Research and Action Programme, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.