Lesmana, Nabilah Widyasari. “Analisis Kemampuan Penalaran Matematis Siswa SMP Pada Materi Himpunan”. Didactical Mathematics 4, no. 1 (March 7, 2022): 119–126. Accessed May 1, 2025. https://www.ejournal.unma.ac.id/index.php/dm/article/view/2040.