Rizky Dwi Prawoto, Isti Fadah & Sumani. “INVESTMENT SIMULATION OF REPLACING PRODUCTION MACHINERY AT A RICE FACTORY SUKORENO MAKMUR”. International Journal of Research Science and Management, vol. 6, no. 7, July 2019, pp. 45-50, http://ijrsm.com/index.php/journal-ijrsm/article/view/222.