Aghastya, Adya. “Perencanaan Dan Normalisasi Drainase Ring Dalam Kereta Api Di Akademi Perkeretaapian Indonesia Madiun”. Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), vol. 2, no. 2, November 2018, hlm. 76-86, https://doi.org/10.37367/jpi.v2i2.6.