Duong, My Tham, Nguyen Thien Duyen Ngo, and Ha Thao Mi Nguyen. “A PROPOSED FRAMEWORK FOR WASHBACK EFFECTS OF E-PORTFOLIOS IN SPEAKING ASSESSMENT”. VNU Journal of Foreign Studies 41, no. 1S (Special Issue) (May 28, 2025): 44–60. Accessed December 22, 2025. https://jfs.ulis.vnu.edu.vn/index.php/fs/article/view/5406.