Sudarto, ’, and A. Sutjahjanti. “COST REDUCTION PENGENDALIAN PERSEDIAAN BAHAN BAKU”. SISTEM Jurnal Ilmu Ilmu Teknik, Vol. 13, no. 3, Dec. 2017, pp. 60-70, https://sistem.wisnuwardhana.ac.id/index.php/sistem/article/view/143.