“Exploring App-Based Autonomous English Vocabulary Learning: Strategies, Motivation and Challenges Among Vietnamese Learners”. The International Journal of Language Studies (ISSN : 3078 - 2244) 2, no. 4 (December 25, 2025): 24–31. Accessed February 5, 2026. https://ijlangstudies.org/index.php/home/article/view/95.