SYAFRIANI, R. .; HASANAH, H. Meningkatkan Pemahaman Konsep IPA Melalui Model Pembelajaran Problem Based Learning Siswa Kelas IV UPTD SPF SD Negeri Pulo Sarok Singkil. Indonesian Research Journal on Education, [S. l.], v. 2, n. 2, p. 526–540, 2022. DOI: 10.31004/irje.v2i2.293. Disponível em: https://irje.org/irje/article/view/293. Acesso em: 6 oct. 2026.