Devi Irene M Rumapea, Susy Alestriani Sibagariang, Benjamin Albert Simamora. The Effect of Online Game Addiction and Learning Concentration on Social Science Students’ Learning Outcomes in Eight Grage of Private Junior High School Kartika 1-4 Pematang Siantar. J. Humanities Educ. Dev. [Internet]. 2022 Oct. 28 [cited 2024 Nov. 16];4(5):91-4. Available from: https://theshillonga.com/index.php/jhed/article/view/189