1. Association of Inspectors General (2018a) Directory of State and Local Inspector general agencies. Retrieved 22 May 2018 at https://inspectorsgeneral.org/useful-links/directory-of-state-and-local-government-oversight-agencies/
2. Association of Inspectors General (2018b) About. Retrieved 22 May 2018 at https://inspectorsgeneral.org/about/
3. California Office of the Inspector General (2018) A message from Inspector General Roy W. Wesley. Retrieved 22 May 2018 at https://www.oig.ca.gov/
4. City of Chicago (2017) Budget overview, pp 137 and 140. Retrieved 22 May 2018 at https://www.cityofchicago.org/content/dam/city/depts/obm/supp_info/2017%20Budget/2017BudgetOverviewFinal.pdf
5. City of New York (2018) New York City’s Inspector General, New York City Department of Investigations. Retrieved 22 May 2018 at https://www1.nyc.gov/site/doi/about/organization.page