Sihotang, Maria Emiwati, and Attin Warmi. “Analisis Kemampuan Berpikir Kritis Matematis Siswa SMP Pada Materi Sistem Persamaan Linear Dua Variabel”. Jurnal Didactical Mathematics 5, no. 2 (July 10, 2023): 282–294. Accessed June 17, 2026. https://www.ejournal.unma.ac.id/index.php/dm/article/view/5907.