Rifka RN, Abdul Halik.AF. Investigating the vowel mispronunciation of undergraduate students of the Faculty of Management and Commerce, South Eastern University of Sri Lanka. JSSMS [Internet]. 2022 Jun. 5 [cited 2024 Apr. 29];1(3):35-41. Available from: https://www.jescae.com/index.php/jssms/article/view/157