Yulianto, Arief, and Wahyuni, Siti. “INTERNAL QUALITY ASSURANCE : MECHANISM OF TOTAL QUALITY MANAGEMENT”. EPRA International Journal of Environmental Economics, Commerce and Educational Management (ECEM) 9, no. 11 (November 28, 2022): 50–53. Accessed May 15, 2024. https://eprajournals.net/index.php/ECEM/article/view/1175.