Sukaton, O. Z., D. P. Nugroho, and A. Y. Ferdinandus. “How Do I Sound? Vowel Production of Multilingual Students at Ma Chung University”. Rainbow : Journal of Literature, Linguistics and Culture Studies, Vol. 12, no. 2, Oct. 2023, pp. 124-33, doi:10.15294/rainbow.v12i2.73338.