Habib Syahputra Banurea, Beni Satria and Solly Aryza (2024) “A Design Of Prepaid Electricity Credit Recharge System Based On Dual Tone Multiple Frequency”, Jurnal Scientia, 13(03), pp. 548-563. Available at: http://seaninstitute.org/infor/index.php/pendidikan/article/view/2529 (Accessed: 18August2025).