Khoiro, Miftakhul. “Validitas Instrumen Strategi Card Sort Pada Pembelajaran”. Educenter : Jurnal Ilmiah Pendidikan 1, no. 11 (November 25, 2022): 817–821. Accessed July 4, 2024. https://jurnal.arkainstitute.co.id/index.php/educenter/article/view/160.