Fauni, Arini Mayang. “Peningkatan Hasil Belajar Matematika Melalui Model Problem Based Learning (PBL) Berbantuan Card Sort Siswa Kelas Lima”. Math Didactic: Jurnal Pendidikan Matematika 5, no. 1 (April 30, 2019): 52-64. Accessed December 5, 2020. https://jurnal.stkipbjm.ac.id/index.php/math/article/view/518.