Fendiyanto, Petrus, and Mufid Siregar. “Analisis Kelayakan Materi Pada Buku Teks Matematika Kurikulum Merdeka SMA Kelas XI Berdasarkan Kriteria Bell”. Jurnal Cendekia : Jurnal Pendidikan Matematika 8, no. 2 (July 8, 2024): 1398-1408. Accessed October 1, 2025. https://www.j-cup.org/index.php/cendekia/article/view/3357.