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Pengaruh Intensitas Penggunakan Smartphone terhadap Kedisiplinan Siswa Kelas 5 SD Muhammaddiyah Birrulwalidain. JCE [Internet]. 2025 Jul. 4 [cited 2026 Apr. 21];2(3):61-5. Available from: http://jurnalcahayaedukasi.com/index.php/jce/article/view/120