Fauziyah, L.; Anzelia, D.; Aisy, F. I.; Kurniawan, M. A.; Sahita, E.; Primaningtias, M. A. Implementation of Internal Control System in the Purchasing Accounting System at PT. Berkat Anugerah Plastik Nganjuk - East Java. IJoSPaT 2025, 3, 11-21.