Nguyen, Thuong, and Dai Tran Manh. “English-Majored Students’ Self-Directed Learning Strategies for Taking English Certificates in the Fulfillment of Program Outcome Standards”. International Journal of Contemporary Studies in Education 5, no. 1 (March 1, 2026): 45–79. Accessed March 15, 2026. https://journals.eduped.org/index.php/ijcse/article/view/1906.