LOKA ANDARI, I. A. K. M.; DARSANA, I. W.; SRI ASRI, A. Pengaruh Model Problem Based Learning (PBL) Berbasis Portofolio Terhadap Hasil Belajar IPS. International Journal of Elementary Education, [S. l.], v. 3, n. 4, p. 373–380, 2019. DOI: 10.23887/ijee.v3i4.21309. Disponível em: https://ejournal.undiksha.ac.id/index.php/IJEE/article/view/21309. Acesso em: 19 mei. 2024.