Analisis Tingkat Konsentrasi Belajar Siswa Akibat Penggunaan Gadget Di SMA Methodist 7 Medan, Jl. Madong Lubis No. 7 Medan. Jurnal Intelek Insan Cendikia, [S. l.], v. 2, n. 6, p. 11658–11665, 2025. Disponível em: https://jicnusantara.com/index.php/jiic/article/view/3802. Acesso em: 11 jul. 2026.