Botha, S. and Musengi, S. 2012, Introduction to Business Management, Fresh Perspectives. Pearson: Cape Town.
Buchanan, James M. and Tullock, Gordon. 1962. The Calculus of Consent: Logical Foundations of Constitutional Democracy. Ann Arbor, Michigan: University of Michigan Press.
Butler, E. 2012. Public Choice- A Primer. London: The Institute of Economic Affairs
Downs, A. 1957. An Economic Theory of Democracy. New York: Harper.
Gwartney, James D. and Richard L. Stroup. 1995. Economics: Private and Public Choice. Ft. Worth, TX: The Dryden Press.
Holcombe, R. 2006. Public Sector Economics: The Role of Government in the American Economy. New Jersey: Prentice Hall.
Hornby, A.S. 2010. Oxford Advanced Learner’s Dictionary (8th Ed.).