Budisantoso, Totok, et al. “Audit Opinion Accuracy, Corporate Governance and Downward Auditor Switching: A Study of Association of Southeast Asian Nations Economics Community”. International Journal of Economics and Financial Issues, vol. 7, no. 5, Oct. 2017, pp. 530-4, https://econjournals.com.tr/index.php/ijefi/article/view/5452.