[1]
Setyaningsih, K.P., Wijayanto, A. and Suparno, S. 2019. English Vowels and Diphthongs Problems of Sundanese Learners. ELS Journal on Interdisciplinary Studies in Humanities. 2, 4 (Dec. 2019), 571-581. DOI:https://doi.org/10.34050/els-jish.v2i4.8413.