“Implementasi Kebijakan Pengumpulan Handphone Pra-KBM: Studi Kasus Manajemen Kedisiplinan Dan Kendala Operasional Di Madrasah Aliyah Laboratorium UINSU Medan”. Sindoro: Cendikia Pendidikan 18, no. 10 (September 30, 2026). Accessed October 17, 2026. https://journal.cib.institute/index.php/sindoro/article/view/4682.