schouten, femmy sofie. 2021. “KONTRIBUSI KEBERLANGSUNGAN USAHA JASA LAYANAN TRANSPORTASI PUBLIK KERETA REL LISTRIK COMMUTER LINE TERHADAP PRODUK DOMESTIK BRUTO SUB SEKTOR ANGKUTAN DARAT”. Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal) 5 (2): 55-64. https://doi.org/10.37367/jpi.v5i2.173.