Lee, Michael, and Wella Wella. “ITIL 2011: The Maturity of IT Service Operation in Universitas Multimedia Nusantara, Indonesia”. IJNMT (International Journal of New Media Technology) 5, no. 2 (March 19, 2019): 90-94. Accessed November 21, 2024. https://ejournals.umn.ac.id/index.php/IJNMT/article/view/914.