Jimola, Folasade Esther. “An Investigation Into Problematic Segmental in The Acquisition of Received Pronunciation of ESL Students”. JEE (Journal of English Education) 8, no. 1 (June 22, 2022): 1–17. Accessed January 31, 2023. https://journal.upp.ac.id/index.php/JEE/article/view/1212.