Hadira, H. et al. 2024. 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, 1 (Mar. 2024), 86–101. DOI:https://doi.org/10.36312/esaintika.v8i1.1622.