Tasya Umaira, et al. “Art 1983 Analysis of the Effectiveness of Facilities and Infrastructure Management at PT Kereta Api Indonesia (Persero) Regional Division I, North Sumatra”. Al Mashaadir : Jurnal Ilmu Syariah, vol. 7, no. 1, June 2026, pp. 60-72, doi:10.52029/jis.v7i1.466.