Widyastuti, R.T. and Airlanda, G.S. 2021. Efektivitas Model Problem Based Learning terhadap Kemampuan Pemecahan Masalah Matematika Siswa Sekolah Dasar. Jurnal Basicedu. 5, 3 (Apr. 2021), 1120–1129. DOI:https://doi.org/10.31004/basicedu.v5i3.896.