Suparman, Achmad Rante, Eli Rohaeti, and Sri Wening. “Development of Computer-Based Chemical Five-Tier Diagnostic Test Instruments: A Generalized Partial Credit Model”. Journal on Efficiency and Responsibility in Education and Science 17, no. 1 (March 31, 2024): 92–106. Accessed November 21, 2024. https://www.eriesjournal.com/index.php/eries/article/view/1104.