Doan, Phuong Ai Ngoc, and Chatraporn Piamsai. “Washback of Vietnamese Standardized Test of English Proficiency (VSTEP.3-5) on Undergraduate Students’ Learning Strategies”. LEARN Journal: Language Education and Acquisition Research Network 18, no. 1 (January 31, 2025): 23–53. accessed April 13, 2025. https://so04.tci-thaijo.org/index.php/LEARN/article/view/277545.