Situmeang W, Sismulyasih SB N. Development of Gamification-Based Story Learning E-Book to Improve Simple Sentence Writing Skills in Grade Two Elementrary School Students. j. paedagog. penelit. pengemb. pendidik. [Internet]. 2026 Apr. 1 [cited 2026 Apr. 6];13(2). Available from: https://ojspanel.undikma.ac.id/index.php/pedagogy/article/view/19610