Maulidi, Ach. “The Investigation and Elimination of Public Procurement Fraud in Government Sectors (A Case Study in Indonesia’s Procurement System: Cases from 2006 to 2012)”. International Journal of Economics and Financial Issues, vol. 7, no. 2, Apr. 2017, pp. 145-54, https://econjournals.com.tr/index.php/ijefi/article/view/3897.