Pratiwi, I., A. Ajam, S. Sudirman, and I. Anwar. “An Analysis Students’ Errors In Pronunciation English Vowels at Third Semester of English Education Study Program”. Jurnal Ilmiah Wahana Pendidikan, Vol. 9, no. 12, June 2023, pp. 668-76, doi:10.5281/zenodo.8122634.