Gunadi, Lie, Epifani R., Supriadi Supriadi, Alfi Mufida Rahmawati, and Shellya Tanaya Dhayinta. “Development of Multimedia Teaching Materials for PPKn Learning through a Design-Based Research Approach”. International Journal of Sustainable English Language, Education, and Science 2, no. 2 (December 31, 2025): 90–96. Accessed February 24, 2026. https://ejournal.cwcu.ac.id/index.php/IJSELES/article/view/106.