Huong Tra, Nguyen Thi, Tran Xuan Bach, and Tran Van Nam. “Hoshin Kanri and the Multi-Tier Catchball Mechanism in Internal Quality Assurance of Vietnamese Higher Education”. RA Journal of Applied Research 12, no. 3 (March 19, 2026): 210–218. Accessed October 25, 2026. https://rajournals.in/index.php/rajar/article/view/1994.