Syahrullah, Yudi, April Yanti, Tigar Putri Adhiana, and Rani Aulia Imran. “GAP Analysis of Higher Education Quality Assurance System Implementation Against Educational Organization Management Standards ISO 21001:2018”. Operations Excellence: Journal of Applied Industrial Engineering 14, no. 1 (May 13, 2022): 67–77. Accessed June 29, 2026. https://publikasi.mercubuana.ac.id/index.php/oe/article/view/12666.