Wiese, Melanie; Van Heerden, Cornelius Hendrik, 1957-; Van Heerden, Neels, 1957-; Jordaan, Yolanda(University of Johannesburg, Department of Business Management, 2010)
Wiese, Melanie; Van Heerden, Cornelius Hendrik, 1957-; Jordaan, Yolanda; North, Ernest J.(College of Economic and Management Sciences, University of South Africa, 2009-04)
Van Heerden, Neels, 1957-; Van Heerden, Cornelius Hendrik, 1957-; Kuiper, Angelique; Saar, Honorata Maria(Southern African Alliance for Sport Science, Physical Education and Recreation, 2008)
Van Heerden, Cornelius Hendrik, 1957-; Van Heerden, Neels, 1957-; Green, M.; Van Tonder, Estelle(Africa Association for Health, Physical Education, Recreation, Sport and Dance, 2007-12)