Safitri, L. et al. 2025. Integrating Problem-Based Learning into E-Modules : A Development Study with Validation and Student Response Analysis. Jurnal Kependidikan: Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran dan Pembelajaran. 11, 1 (Mar. 2025), 397–409. DOI:https://doi.org/10.33394/jk.v11i1.14836.