Susanto, Teguh Trianung Djoko, Putri Bestari Dwiyanti, Arita Marini, Julius Sagita, Desy Safitri, and Evitha Soraya. “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, no. 20 (October 31, 2022): pp. 4–17. Accessed April 28, 2024. https://online-journals.org/index.php/i-jim/article/view/32951.