De Jongh, Derick; Rensburg, Ronel S.; De Wet, J.M.(Unit for Community Communication, Department of Communication and Information Studies, University of the Free State, 2005)
Niemann-Struweg, Ilse; Meintjes, Corne; Grobler, Anske F.(Unit for Community Communication, Dept of Communication and Information Studies, University of the Free State, 2007)