Sitorus, Jesika, Dede Ruslan, and Rosmala Dewi. “Development of PPKn Worksheet Using Problem-Based Learning to Improve Critical Thinking”. Inovasi Kurikulum 22, no. 4 (November 28, 2025): 2315–2330. Accessed January 29, 2026. https://ejournal-hipkin.or.id/index.php/jik/article/view/123.