Botha, Melodi; Bignotti, Alex(University of Pretoria, Department of Business Management & Academic Entrepreneurship Society of South Africa (AcES), 2016-09-29)
De Wit, P.W.C. (Pieter Willem Combrink), 1947-; Steyn, Martha Magdalena(Department of Transport and Supply Chain Management, University of Johannesburg, 2007-11)