Niemann-Struweg, Ilse; Meintjes, Corne; Grobler, Anske F.(Unit for Community Communication, Dept of Communication and Information Studies, University of the Free State, 2007)
Van Deventer, P.J.; Snyman, M.M.M. (Maria Magdalena Margaretha); Snyman, Retha(Department of Knowledge and Information Management, University of Johannesburg, 2004-03)