Não informado. (1964). Bulletin of Rural Economics and Sociology. University of Ibadan, Department of Agricultural Economics and Extension.
Lua i Stíl Chicago (17ú heag.)Não informado. Bulletin of Rural Economics and Sociology. Ibadan, Nigeria: University of Ibadan, Department of Agricultural Economics and Extension, 1964.
Lua MLA (8ú heag.)Não informado. Bulletin of Rural Economics and Sociology. University of Ibadan, Department of Agricultural Economics and Extension, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.