HO, Pham Vu Phi; LONG, Than Thanh; HOA, Truong Minh. Vietnamese High School Students’ Appraisal of Speaking Problems and Influential Factors. International Journal of English Language Studies, [S. l.], v. 2, n. 3, p. 33–44, 2020. DOI: 10.32996/ijels.2020.2.3.4. Disponível em: https://al-kindipublishers.org/index.php/ijels/article/view/76. Acesso em: 4 may. 2026.