DR. YEN, VUONG THI HAI YEN; NGUYET, NGUYEN THI ANH MA. A contrastive study on expressing formulas of the speech act of direct refusal of invitations by the Vietnamese and native speakers of American English. Eastern Journal of Languages, Linguistics and Literatures, [S. l.], v. 4, n. 3, p. 49–58, 2023. DOI: 10.53906/ejlll.v4i3.233. Disponível em: https://qabasjournals.com/index.php/ejlll/article/view/233. Acesso em: 3 jul. 2026.