Van Loi, Nguyen, and Chung Thi Thanh Hang. “English Proficiency Gain and Mediating Factors in Training: A Self-Evaluation of Vietnamese Pre-Service EFL Teachers”. International Journal of Learning, Teaching and Educational Research 20, no. 1 (January 31, 2021): 22–47. Accessed July 28, 2026. https://ijlter.net/index.php/ijlter/article/view/166.