Oberholzer, Ruanda(Independent Regulatory Board for Auditors (IRBA), South African Institute of Chartered Accountants (SAICA) and Southern African Accounting Association (SAAA), 2007)
Daud, Dzurllkanian Zulkarnain; Kamarudin, Norhaya; Franzsen, R.C.D. (Riel); McCluskey, William J.(International Association of Assessing Officers and the International Property Tax Institute, 2013)
Buzu, Olga; McCluskey, William J.; Franzsen, R.C.D. (Riel)(International Association of Assessing Officers and the International Property Tax Institute, 2012)
Oberholzer, Ruanda(Independent Regulatory Board for Auditors (IRBA), South African Institute of Chartered Accountants (SAICA) and Southern African Accounting Association (SAAA), 2004-06)