LE, H. H.; LUONG, T. D. Using Flashcard-Based Techniques to Improve Students’ Vocabulary Retention. Vietnam Journal of Education, [S. l.], v. 7, n. 3, p. 313–325, 2023. DOI: 10.52296/vje.2023.336. Disponível em: https://vje.vn/index.php/journal/article/view/336. Acesso em: 13 may. 2024.