Ongaro, W. A. (1988). Adoption of new farming technology: A case study of maize production in Western Kenya. Göteborgs universitet.
Lua i Stíl Chicago (17ú heag.)Ongaro, Wilfred Abuom. Adoption of New Farming Technology: A Case Study of Maize Production in Western Kenya. [Göteborg]: Göteborgs universitet, 1988.
Lua MLA (8ú heag.)Ongaro, Wilfred Abuom. Adoption of New Farming Technology: A Case Study of Maize Production in Western Kenya. Göteborgs universitet, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.