“RANCANG BANGUN SISTEM INFORMASI PREVENTIVE MAINTENANCE PT. KAI UNIT SINTELIS 8.5 SURABAYA GUBENG” (2020) Prosiding SEMNAS INOTEK (Seminar Nasional Inovasi Teknologi), 1(1), pp. 085–092. doi:10.29407/inotek.v1i1.355.