De Wit, P.W.C. (Pieter Willem Combrink), 1947-; Steyn, Martha Magdalena(Department of Transport and Supply Chain Management, University of Johannesburg, 2007-11)
Oosthuizen, Adele; Van Vuuren, Jurie Jansen; Botha, Melodi(University of Pretoria, Department of Business Management & Academic Entrepreneurship Society of South Africa (AcES), 2020-06-30)
Strydom, Retha; Adams, Menisha(Department of Business Management, University of Pretoria & Academic Entrepreneurship Society of South Africa (AcES), 2009)