Sani Susanti, Andriani Helda Manalu, Novianti Pakpahan, Sarah Anjelina Pinem, Yoca Vibertina Br Pinem. Analisis Tingkat Konsentrasi Belajar Siswa Akibat Penggunaan Gadget Di SMA Methodist 7 Medan, Jl. Madong Lubis No. 7 Medan. JIIC. 2025;2(6):11658-11665. Accessed October 26, 2026. https://jicnusantara.com/index.php/jiic/article/view/3802