USMAN, A.; ABDULLAHI, D. M. Productive Vocabulary Knowledge of ESL Learners. Asian Journal of Interdisciplinary Research, [S. l.], v. 1, n. 1, p. 32–41, 2018. DOI: 10.34256/ajir1814. Disponível em: https://journals.asianresassoc.org/index.php/ajir/article/view/429. Acesso em: 27 apr. 2024.