RUSMAWATY, D.; LIMBONG, E.; AHADA, I.; HAFIZH, M. I. F.; RAHMATULLAH, A. N. Unlocking Phonological Proficiency: Exploring Allophonic Variation Using ELSA Speak App in Early Semester EFL Students at Mulawarman University. Indonesian Journal of EFL and Linguistics, v. 9, n. 2, p. 337-348, 1 nov. 2024.