INFORMATION GAP ACTIVITIES AT THE NINTH GRADE OF SMP NEGERI 7 TANJUNG BALAI. JOURNAL OF SCIENCE AND SOCIAL RESEARCH, [S. l.], v. 4, n. 2, p. 185–190, 2021. DOI: 10.54314/jssr.v4i2.583. Disponível em: https://goretanpena.com/jurnal/index.php/JSSR/article/view/583.. Acesso em: 3 aug. 2026.