Wibowo AI, Adi WT, Pratama RMD. Mispronouncing English Vowel Sounds on Office Admisintrative’s Students Universitas Bina Sarana Informatika. ijoltl [Internet]. 2021Sep.13 [cited 2024Apr.24];6(3):231-8. Available from: https://ijotl-tl.soloclcs.org/index.php/ijoltl/article/view/679