Não informado. (1974). Journal of Rural Economics and Development. University of Ibadan, Department of Agricultural Extension Services.
Citação do estilo Chicago (17ª ed.)Não informado. Journal of Rural Economics and Development. Ibadan, Nigeria: University of Ibadan, Department of Agricultural Extension Services, 1974.
Citação MLA (8ª ed.)Não informado. Journal of Rural Economics and Development. University of Ibadan, Department of Agricultural Extension Services, 1974.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.