Akhwan, Akhwan, dkk. “DESAIN KONTROL MESIN PENCUCI KERETA DAN GERBONG BERBASIS PLC OMRON CPM1A”. Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), vol. 4, no. 2, Desember 2020, hlm. 124-8, https://doi.org/10.37367/jpi.v4i2.130.