Nguyen, C. H., Nguyen, H. T., & Le, T. Q. (2021). Boosting English Majors’ Ability in Pronouncing Stressed Vowels via Blue Canoe, a Mobile-based Application: A Focus on Vietnamese EFL Learners. AsiaCALL Online Journal, 12(4), 46-65. Retrieved from https://www.asiacall.info/acoj/index.php/journal/article/view/64