Widodo, Ari, and Wahyu Sapto Aji. “Palang Pintu Kereta Api Pneumatik Otomatis Berbasis PLC Omron CP1E-NA20DR-A”. Buletin Ilmiah Sarjana Teknik Elektro 1, no. 2 (August 30, 2019): 82–90. Accessed April 29, 2024. http://www.journal2.uad.ac.id/index.php/biste/article/view/1011.