Hadira, Hadira, Murni Sapta Sari, and Sulisetijono Sulisetijono. “Development of E-Modules Based on Problem-Based Learning to Improve Problem-Solving Skills and Student Self-Efficacy”. Jurnal Penelitian dan Pengkajian Ilmu Pendidikan: e-Saintika 8, no. 1 (March 20, 2024): 86–101. Accessed February 2, 2026. https://journal-center.litpam.com/index.php/e-Saintika/article/view/1622.