The Effect of Using the Duolingo Application on Elementary School Students’ Mastery of English Vocabulary. Educational Studies and Research Journal, [S. l.], v. 1, n. 2, p. 93–98, 2024. DOI: 10.5281/zenodo.12579678. Disponível em: https://journal.midpublisher.com/index.php/esrj/article/view/60. Acesso em: 6 feb. 2025.