Happy, Nurina, and Djamilah Bondan Widjajanti. “KEEFEKTIFAN PBL DITINJAU DARI KEMAMPUAN BERPIKIR KRITIS DAN KREATIF MATEMATIS, SERTA SELF-ESTEEM SISWA SMP”. Jurnal Riset Pendidikan Matematika 1, no. 1 (May 1, 2014): 48–57. Accessed June 8, 2025. https://jurnal.uny.ac.id/index.php/jrpm/article/view/2663.