NGO, Thi Hien Trang. Using Apology Strategies in Letters by EFL Students at University of Foreign Language Studies – The University of Danang. International Journal of Language Instruction, [S. l.], v. 1, n. 2, p. 1–12, 2022. DOI: 10.54855/ijli.22121. Disponível em: https://i-jli.org/index.php/journal/article/view/66. Acesso em: 16 may. 2024.