Idris, I. T., and S. Nayan. “The Moderating Role of Loan Monitoring on the Relationship Between Macroeconomic Variables and Non-Performing Loans in Association of Southeast Asian Nations Countries”. International Journal of Economics and Financial Issues, vol. 6, no. 2, Apr. 2016, pp. 402-8, https://econjournals.com/index.php/ijefi/article/view/1767.