Tambunan, Efendy. “ANALISIS KUALITAS PELAYANAN KA COMMUTER LINE RUTE PARUNGPANJANG-TANAH ABANG”. Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH 1, no. 1 (April 25, 2020): 15-23. Accessed May 3, 2024. http://ejournal.uki.ac.id/index.php/cen/article/view/1427.