Ng, Phan Trong, Vu Dung, Le Minh Nguyet, Vu Thi Khanh Linh, Hoang Thanh Thuy, and Nguyen Thi Tinh. “Academic Anxiety of Vietnamese Secondary School Students As a Reason for Applying Online Learning”. Journal of Intellectual Disability - Diagnosis and Treatment 8, no. 4 (November 27, 2020): 730–739. Accessed April 29, 2024. https://www.lifescienceglobal.com/pms/index.php/jiddt/article/view/6954.