NIAZI, S. M.; FARHAT, P. A.; GHULAMULLAH. Contrastive Analysis of the Vowel Sound System of Urdu and English Languages. Pakistan Languages and Humanities Review, Gujranwala, Pakistan, v. 7, n. 4, p. 228–240, 2023. DOI: 10.47205/plhr.2023(7-IV)20. Disponível em: https://ojs.plhr.org.pk/journal/article/view/675. Acesso em: 20 may. 2024.