Pengaruh Intensitas Penggunakan Smartphone terhadap Kedisiplinan Siswa Kelas 5 SD Muhammaddiyah Birrulwalidain. JCE [Internet]. 2025 Jul. 4 [cited 2025 Sep. 29];3(3):61-5. Available from: https://jurnalcahayaedukasi.com/index.php/jce/article/view/120