Grobbelaar, Heinrich W.; Malan, Dawie D.J.; Steyn, B.J.M. (Barend Johannes Marthinus); Ellis, Suria M.(Africa Association for Health, Physical Education, Recreation, Sport and Dance, 2011-12)
Woudstra, Marit Helen; Janse van Rensburg, Estie; Visser, M.J. (Maretha Johanna); Jordaan, J.C. (Joyce)(Education Association of South Africa, 2018-02)