Anggreni, Ni Wayan Yurita, and Gusti Ngurah Sastra Agustika. 2020. “Model Pembelajaran Problem Based Learning Berbasis Penilaian Portofolio Terhadap Kompetensi Pengetahuan Matematika”. Jurnal Ilmiah Pendidikan Profesi Guru 3 (1):61-72. https://doi.org/10.23887/jippg.v3i1.26814.