Du Toit, Elda(Independent Regulatory Board for Auditors (IRBA), South African Institute of Chartered Accountants (SAICA) and Southern African Accounting Association (SAAA), 2008)
Wolmarans, Hendrik Petrus; Meintjes, Quentin(University of Pretoria, Department of Business Management & Academic Entrepreneurship Society of South Africa (AcES), 2015)
De Wet, Johannes H.v.H. (Johannes Hendrik van Heerden); Hall, J.H. (John Henry)(Faculty of Economic and Management Sciences University of Pretoria, 2006-03)