KALAHARI, I. B.; SUDARMIANI, S.; NUGRAHA, N. Implementing Problem-Based Learning to Improve Social Skills and Social Studies Learning Outcomes among Seventh-Grade Students at SMPN 14 Madiun. Journal of General Education and Humanities, Bandung, Indonesia, v. 5, n. 4, p. 4441–4456, 2026. DOI: 10.58421/gehu.v5i4.1809. Disponível em: https://journal-gehu.com/index.php/gehu/article/view/1809. Acesso em: 15 jul. 2026.