1. Transparency International [TI] (2016). Corruption Perceptions Index 2016 [available online: https://www.transparency.org/news/feature/corruption_perceptions_index_2016 ]. Accessed 11 Sept 2017.
2. Kaufmann, D., & Kraay, A. (2009). Governance matters VIII: Aggregate and individual governance indicators, 1996–2008. Washington, DC: World Bank Institute.
3. Hardoon, D., & Heinrich, F. (2013). Global corruption barometer 2013. Berlin: Transparency International.
4. Sampford, C., Shacklock, A., Galtung, F., & Connors, C. (Eds.). (2008). Measuring corruption. Aldershot: Ashgate.
5. Heywood, P., & Rose, J. (2014). “Close but no cigar”: The measurement of corruption. Journal of Public Policy, 34(3), 507–529.