Prasasti, Ian Harum, and Edi Istiyono. “Developing an Instrument of National Examination of Equivalency Education Package C of Mathematics Subject”. REID (Research and Evaluation in Education) 4, no. 1 (July 1, 2018): 58–69. Accessed May 8, 2025. https://journal.uny.ac.id/index.php/reid/article/view/15556.