NINGTYAS, E. C.; LBS, S. A. PENGARUH SMARTPHONE DAN GAME ONLINE TERHADAP PROBLEMATIKA AKHLAK DAN HASIL BELAJAR SISWA SMK SINAR HUSNI MEDAN. Journal of Education Research, [S. l.], v. 4, n. 3, p. 1285–1298, 2023. DOI: 10.37985/jer.v4i3.313. Disponível em: https://jer.or.id/index.php/jer/article/view/313. Acesso em: 6 jul. 2025.