“Implementation of Internal Control System in the Purchasing Accounting System at PT. Berkat Anugerah Plastik Nganjuk - East Java”. Indonesian Journal of Sustainability Policy and Technology 3, no. 1 (May 31, 2025): 11–21. Accessed September 13, 2026. https://www.dhsjournal.id/index.php/ijospat/article/view/320.