GUNADI, Lie, Epifani R.; SUPRIADI, Supriadi; RAHMAWATI, Alfi Mufida; DHAYINTA, Shellya Tanaya. Development of Multimedia Teaching Materials for PPKn Learning through a Design-Based Research Approach. International Journal of Sustainable English Language, Education, and Science, [S. l.], v. 2, n. 2, p. 90–96, 2025. DOI: 10.71131/g31e0y67. Disponível em: https://ejournal.cwcu.ac.id/index.php/IJSELES/article/view/106.. Acesso em: 24 feb. 2026.