Dermawan, D., & Hidayah, W. (2017). Evaluasi Quantity Spare Parts dengan Pendekatan EOQ (Economic Order Quantity) PT. Kobexindo Tractors. Tbk Cabang Pekanbaru. JURNAL SURYA TEKNIKA, 5(02), 34–38. https://doi.org/10.37859/jst.v5i02.642