Tham, Duong My, and Nguyen Le Trinh. “AN E-PORTFOLIO: A PROMISING TOOL FOR PROMOTING LEARNERS’ AUTONOMOUS LEARNING COMPETENCIES IN AN EFL SPEAKING COURSE”. VNU Journal of Foreign Studies, vol. 38, no. 6, Dec. 2022, pp. 148-59, doi:10.25073/2525-2445/vnufs.4891.