Zakaria, Fariz, Wasis Haryo Sasoko, and Ema Utami. “Analysis of Question Items Using the Differentiating Power Method”. International Journal of Informatics, Information System and Computer Engineering (INJIISCOM) 6, no. 1 (August 12, 2024): 63–69. Accessed December 15, 2025. https://ojs.unikom.ac.id/index.php/injiiscom/article/view/11920.