Sani, Asrul, Ninuk Wiliani, and T. Husain. “Spreadsheet Usability Testing in Nielsen’s Model Among Users of ITSMEs to Improve Company Performance”. European Journal of Scientific Exploration 2, no. 6 (December 30, 2019). Accessed May 4, 2025. https://www.syniutajournals.com/index.php/EJSE/article/view/127.