1. Andersson, S. 2008. Studying the risk of corruption in the least corrupt countries. Public Integrity 10 (3): 193–214. https://doi.org/10.2753/PIN1099-9922100301.
2. Anechiarico, F., and J.B. Jacobs. 1996. The pursuit of absolute integrity: How corruption control makes government ineffective. Chicago: University of Chicago Press.
3. Brown, A. J., S. Ankamah, K. Coghill, A. Graycar, K. Kelly, T. Prenzler, and J. Ransley. 2019. Governing for integrity: A blueprint for reform: Draft report of Australia’s second National Integrity System assessment. Griffith University & Transparency International Australia. Retrieved from Brisbane: https://www.griffith.edu.au/__data/assets/pdf_file/0028/726247/Governing-for-Integrity-Australia-2nd-NIS-Assessment-DRAFT-REPORT-April2019.pdf
4. de Graaf, G., and L. Huberts. 2008. Portraying the nature of corruption using an explorative case study design. Public Administration Review 68 (4): 640–653.
5. Desta, Y. 2019. Manifestations and causes of civil service corruption in developing countries. Journal of Public Administration and Governance 9 (3): 23–35.