Mubangizi, N., M. N. Mangheni, and C. J. Garforth. “Information Sources and Constraints under National Agricultural Advisory Services Programme, of Service Providers in Uganda”. Uganda Journal of Agricultural Sciences, vol. 9, no. 1, Sept. 2004, pp. 257-64, http://journal.naro.go.ug/index.php/ujas/article/view/226.