Stevens, Joseph Benjamin(South African Society for Agricultural Extension, Department of Agricultural Ecomomics, Extension and Rural Development, University of Pretoria, 2007)
Borman, M.E.; Nealer, E.J.; Stevens, Joseph Benjamin(South African Society for Agricultural Extension, Department of Agriculture, Ecomomics, Extensions and Rural Development, University of Pretoria, 2009)
Terblanche, S.E. (Stephanus Esaias), 1940-; Stevens, Joseph Benjamin; Sekgota, Mpolaeng Gilbert(South African Society for Agricultural Extension, Department of Agriculture, Economics, Extension and Rural Development, University of Pretoria, 2014)
Gemo, Helder R.; Stevens, Joseph Benjamin; Chilonda, P.(South African Society for Agricultural Extension, Department of Agriculture, Ecomomics, Extensions and Rural Development, University of Pretoria, 2013)