Susanto, Teguh Trianung Djoko, Putri Bestari Dwiyanti, Arita Marini, Julius Sagita, Desy Safitri, and Evitha Soraya. 2022. “E-Book With Problem Based Learning to Improve Student Critical Thinking in Science Learning at Elementary School”. International Journal of Interactive Mobile Technologies (iJIM) 16 (20):pp. 4-17. https://doi.org/10.3991/ijim.v16i20.32951.