Chalis, Ghea Annisa, and yetti Ariani. “Pengaruh Model Problem Based Learning (PBL) Terhadap Hasil Belajar Pecahan Di Sekolah Dasar”. Jurnal Pendidikan Tambusai, vol. 4, no. 3, Nov. 2020, pp. 2936-44, doi:10.31004/jptam.v4i3.794.