ASONIBARE, Victory T. Vowel Articulation Errors in Nigerian Secondary Students’ Spoken English: An Error-Analysis Study. African Journal of Humanities and Contemporary Education Research, Nigeria, v. 21, n. 1, p. 31–45, 2025. DOI: 10.62154/ajhcer.2025.021.013. Disponível em: https://afropolitanjournals.com/index.php/ajhcer/article/view/1220.. Acesso em: 27 oct. 2026.