Hattingh, Annemarie; Rogan, John M.; Aldous, Colleen; Howie, Sarah J.; Venter, Elsie(Southern African Association for Research in Mathematics, Science and Technology Education, 2005)
Carrim, Nasima Mohamed Hoosen; Basson, Johan Schutte; Coetzee, Melinde(Graduate School of Business Leadership and the Department of Business Management, University of South Africa, 2006)
Van Deventer, P.J.; Snyman, M.M.M. (Maria Magdalena Margaretha); Snyman, Retha(Department of Knowledge and Information Management, University of Johannesburg, 2004-03)