บุญหนุน ส. Free online English Dictionaries: Their Optimum use for English Learning and Teaching. Journal of Humanities and Social Sciences, Rajapruk University, [S. l.], v. 5, n. supplement, p. 1–14, 2019. Disponível em: https://so03.tci-thaijo.org/index.php/rpu/article/view/231785. Acesso em: 26 apr. 2024.