Laksono, Agung. “RANCANG BANGUN APLIKASI PENJUALAN PULSA ELEKTRIK BERBASIS JAVA J2SE”. Dinamika Informatika : Jurnal Ilmiah Teknologi Informasi 4, no. 1 (March 1, 2012). Accessed July 23, 2024. https://www.unisbank.ac.id/ojs/index.php/fti2/article/view/3757.