Yuris Danilwan, Mardiana Mardiana, and Wahyu Syahputra. 2020. “PERANCANGAN COUNTER INPUT-OUTPUT PENJUALAN MENGGUNAKAN BARCODE READER BERBASIS ANDORID”. Journal of Maritime and Education (JME) 1 (2). https://ejournal.poltek-amimedan.ac.id/index.php/jme/article/view/9.