Manurung, Pebrina, and Mori Agustina br Perangin-angin. “Hubungan Lama Penggunaan Gadget Dengan Prestasi Belajar Siswa SDN Harapan Mulya Parongpong”. Ranah Research : Journal of Multidisciplinary Research and Development 7, no. 1 (November 26, 2024): 450-456. Accessed December 26, 2024. https://jurnal.ranahresearch.com/index.php/R2J/article/view/1219.