Salamah, Fitriani, and Risma Amelia. “Upaya Meningkatkan Self Confidence Siswa SMK Menggunakan Pendekatan Open Ended”. Jurnal Cendekia : Jurnal Pendidikan Matematika 3, no. 1 (April 25, 2019): 28-33. Accessed July 26, 2026. https://j-cup.org/index.php/cendekia/article/view/68.