Korah, Tonny C.M, et al. “PENINGKATAN PELAYANAN KA COMMUTER JABODETABEK”. Jurnal Penelitian Sekolah Tinggi Transportasi Darat, vol. 6, no. 1, Nov. 2015, pp. 11-23, https://jurnal.ptdisttd.ac.id/index.php/jpsttd/article/view/2.