O. A., Awopeju, and Afolabi, E. R. I. “Comparative Analysis of Classical Test Theory and Item Response Theory Based Item Parameter Estimates of Senior School Certificate Mathematics Examination”. European Scientific Journal, ESJ 12, no. 28 (October 31, 2016): 263. Accessed April 25, 2024. https://eujournal.org/index.php/esj/article/view/8180.