DARSANA, I. G. B.; WIARTA, I. W.; PUTRA, M. Pengaruh Model Problem Based Learning Berbasis Portofolio Terhadap Kompetensi Pengetahuan Matematika. Jurnal Penelitian dan Pengembangan Pendidikan, [S. l.], v. 3, n. 3, p. 200–207, 2019. DOI: 10.23887/jppp.v3i3.18608. Disponível em: https://ejournal.undiksha.ac.id/index.php/JJL/article/view/18608. Acesso em: 9 dec. 2024.