XIN, L. The Presentation of Speech Acts in Oral English Textbooks. Journal of Linguistics and Education Research, [S. l.], v. 4, n. 2, p. 1–13, 2021. DOI: 10.30564/jler.v4i3.4443. Disponível em: https://journals.bilpubgroup.com/index.php/jler/article/view/4443. Acesso em: 9 jul. 2025.