Wibowo, Mungin Eddy, Mulawarman Mulawarman, and Edy Purwanto. “Problematic Internet Use in Semarang Middle School Students ”. KnE Social Sciences 3, no. 18 (July 3, 2019): 461–469. Accessed August 4, 2020. https://knepublishing.com/index.php/KnE-Social/article/view/4737.