Nizar, Harisman, Somakim Somakim, and Muhammad Yusuf. “Pengembangan LKS Dengan Model Discovery Learning Pada Materi Irisan Dua Lingkaran”. Jurnal Elemen 2, no. 2 (July 27, 2016): 161–178. Accessed May 5, 2024. https://e-journal.hamzanwadi.ac.id/index.php/jel/article/view/232.