Kriswantoro, and Rizki Nor Amelia. “Psychometric Characteristics of the Kalam Cognitive Test (KCT): An Andrich Rating Scale Analysis”. Jurnal Penelitian 20, no. 1 (March 27, 2023): 55–66. Accessed July 4, 2024. https://e-journal.uingusdur.ac.id/Penelitian/article/view/1098.