1. Berghe, A. (2012). International Standardisation of Good Corporate Governance: Best Practices for the Board of Directors (2nd ed.) Dordrecht, Springer Science.
2. Bizcommunity.com. (2006). Medical Aid Solvency ratios need to change. 26 September 2006. http://www.bizcommunity.com/Article/196/320/151391.html
3. Collins, M. (1998). Sampling, In: Mc Donald, C. & Vangelder P. (eds.). ESOMAR handbook of market and opinion research. 4th Edition. Amsterdam. ESOMAR.
4. Cook, M. (2003) Third World Bioethics Australasian Science; Dec 2013; 34, 10; ProQuest pg.50.S
5. Council for Medical Schemes Annual Report 2016/2016I