Ponco, A., and Y. Setiawan. “PEMBUATAN SISTEM KONTROL MESIN DRILL CHAMPER MENGGUNAKAN PLC MITSUBISHI FX3U-48MR”. Technologic, vol. 5, no. 1, June 2014, https://technologic.polytechnic.astra.ac.id/index.php/firstjournal/article/view/37.