Asih, Tri Lestari Budi, Baskoro Adi Prayitno, and Sri Retno Dwi Ariani. 2022. “Improving the Problem-Solving Skill of Students Using Problem-Based Learning-Based E-Modules”. Jurnal Penelitian Pendidikan IPA 8 (3):1447-52. https://doi.org/10.29303/jppipa.v8i3.1696.