Agus Purwowidodo. M-Learning-E-Book: Higher Level Thinking Skills, Retention, Motivation of Junior High School Students. ji [Internet]. 2023 Nov. 28 [cited 2025 Aug. 25];8(2):300-24. Available from: https://www.journal.iaimnumetrolampung.ac.id/index.php/ji/article/view/3395