Delawanti Chrisyarani, Denna, and Prihatin Sulistyowati. 2022. “Design and Validation of Thematic E-Modules: Optimization of Problem Solving-Based Learning”. JURNAL PENDIDIKAN DASAR NUSANTARA 7 (2):344-53. https://doi.org/10.29407/jpdn.v7i2.16811.