1. Association of Certified Fraud Examiners. (2006). 2006 report to the nation on occupational fraud and abuse. https://www.acfe.com/-/media/files/acfe/pdfs/2006-rttn.ashx
2. Association of Certified Fraud Examiners. (2016). Report to the nations on occupational fraud and abuse. http://www.acfe.com/rttn2016.aspx
3. Association of Certified Fraud Examiners. (2020). Report to the nations: 2020 global study on occupational fraud and abuse. https://acfepublic.s3-us-west-2.amazonaws.com/2020-Report-to-the-Nations.pdf
4. Association of Certified Fraud Examiners. (2022). Occupational fraud 2022: A report to the nations. https://acfepublic.s3.us-west-2.amazonaws.com/2022+Report+to+the+Nations.pdf
5. Atwater, K. (2006, October 23). Whistle blowers enforce procurement ethics. American City & County. http://americancityandcounty.com/mag/whistle-blowersenforce-procurement-ethics