Ulfah, A.F. and Prahmana, R.C.I. 2018. Single Subject Research: Implementasi Pembelajaran Berbasis Masalah terhadap Pemahaman Matematis Siswa. Jurnal Elemen. 4, 1 (Jan. 2018), 105–118. DOI:https://doi.org/10.29408/jel.v4i1.553.