DZULFIQAR, M. .; BEKTININGSIH, K. . MarBel Math: Android-Based Electronic Mathematics Book to Enhance Learning Outcomes for Fourth-Grade Students . International Journal of Elementary Education, [S. l.], v. 8, n. 2, p. 304–313, 2024. DOI: 10.23887/ijee.v8i2.77263. Disponível em: https://ejournal.undiksha.ac.id/index.php/IJEE/article/view/77263. Acesso em: 30 nov. 2024.