De Boer, Ann-Louise; Du Toit, Pieter Hertzog; Bothma, T.J.D. (Theodorus Jan Daniel)(Vaal Triangle Faculty of Northwest University in South Africa, 2015-11)
Le Roux, Alta; Snyman, M.E. (Martha Elizabeth)(Unit for Community Communication, Dept of Communication and Information Studies, University of the Free State, 2007-11)