TELAUMBANUA, Y. A. .; HAREFA, S. T. H. .; ZEBUA, M. R.; ZEGA, S. M.; ZALUKHU, J.; MENDROFA, R. Comparison of the Effectiveness of Duolingo and Cake Applications in Improving Students’ English Language Proficiency . Jurnal Penelitian Inovatif, [S. l.], v. 4, n. 4, p. 2395–2400, 2024. DOI: 10.54082/jupin.841. Disponível em: https://www.jurnal-id.com/index.php/jupin/article/view/841. Acesso em: 6 nov. 2025.