Muangkhoua, S. (2017) “Test Analysis with Classical Test Theory (CTT): Finding Item Difficulty and Item Discrimination using SPSS Program”, Vajira Medical Journal : Journal of Urban Medicine, 61(4), pp. 291–318. available at: https://he02.tci-thaijo.org/index.php/VMED/article/view/196119 (accessed: 19 September 2026).