SYAFI QURRAHMAN LUBIS; UMMUL KHAIR; ARNES SEMBIRING. Jam Bel Sekolah Dengan Menghidupkan Speaker Otomatis. SNASTIKOM, [S. l.], v. 1, n. 01, p. 246–257, 2022. Disponível em: https://prosiding.snastikom.com/index.php/SNASTIKOM2020/article/view/9. Acesso em: 1 nov. 2025.