RISNAWATI, R. Pengaruh Model Problem Based Instruction (PBI) dengan Pendekatan Open Ended Terhadap Pemahaman Konsep dan Kemampuan Penalaran Matematika Siswa. Beta: Jurnal Tadris Matematika, [S. l.], v. 4, n. 2, p. 101–119, 2011. Disponível em: https://jurnalbeta.ac.id/index.php/betaJTM/article/view/82. Acesso em: 16 aug. 2026.