Sukaton, Ounu Zakiy, Didit Prasetyo Nugroho, and Aldrin Yohanes Ferdinandus. “How Do I Sound? Vowel Production of Multilingual Students at Ma Chung University”. Rainbow : Journal of Literature, Linguistics and Culture Studies 12, no. 2 (October 28, 2023): 124-133. Accessed November 22, 2024. https://journal.unnes.ac.id/sju/rainbow/article/view/73338.