Rachman, Taufiq, and Darmawan Baginda Napitupulu. “Rasch Model for Validation a User Acceptance Instrument for Evaluating E-Learning System”. CommIT (Communication and Information Technology) Journal 11, no. 1 (August 1, 2017): 9–16. Accessed August 2, 2025. https://journal.binus.ac.id/index.php/commit/article/view/2042.