CHARACTERISTICS OF THE TEXTBOOK “COMMUNICATIONS CORRESPONDENCE”. Journal of Foreign Language Studies, [S. l.], n. 06, p. 63–69, 2024. DOI: 10.56844/tckhnn.06.303. Disponível em: http://journals.hanu.edu.vn/index.php/tckhnn/article/view/303. Acesso em: 15 jan. 2026.