TAMTAMA, G. I. W.; SURYANTO, P.; SUYOTO, S. Design of English Vocabulary Mobile Apps Using Gamification: An Indonesian Case Study for Kindergarten. International Journal of Engineering Pedagogy (iJEP), [S. l.], v. 10, n. 1, p. pp. 150–162, 2020. DOI: 10.3991/ijep.v10i1.11551. Disponível em: https://online-journals.org/index.php/i-jep/article/view/11551. Acesso em: 19 aug. 2022.