Ayanwale, Musa Adekunle. “Calibration of Polytomous Response Mathematics Achievement Test Using Generalized Partial Credit Model of Item Response Theory”. EDUCATUM Journal of Science, Mathematics and Technology 8, no. 1 (June 4, 2021): 57–69. Accessed December 4, 2024. https://ejournal.upsi.edu.my/index.php/EJSMT/article/view/5029.