A Contrastive Analysis of the Production of English and Yoruba Vowels by Yoruba-English Bilingual Students in University of Nigeria, Nsukka. GJHSS [Internet]. 2021 May 19 [cited 2026 Sep. 29];21(G6):29-36. Available from: https://www.socialscienceresearch.org/index.php/GJHSS/article/view/3648