Ardika, G. ., Sukmana, A. I. W. I. Y. ., & Sudarma, I. K. . (2024). Problem-Based Learning E-Book for Natural and Social Sciences in Fourth-Grade of Elementary Schools. Jurnal Pedagogi Dan Pembelajaran, 7(3), 492–503. https://doi.org/10.23887/jp2.v7i3.82690