Radikonyana, Paul Shimane; Heath, Ernest Thomas; Fairer-Wessels, Felicite A.; Prinsloo, Johannes J; Pelser, Theuns G.(Clute Institute for Academic Research, 2015-03)
Douglas, Anneli; Mostert, P.G. (Pierre); Slabbert, Liandi Magdalena(Department of Recreation, Park, and Tourism Sciences at Texas AandM University, 2019)