SUMIANTO, Sumianto. Penerapan model problem based learning untuk meningkatkan kemampuan berpikir kritis dan sikap peduli lingkungan siswa sekolah dasar. Jurnal Penelitian Pendidikan, [S. l.], v. 17, n. 2, p. 179–188, 2017. DOI: 10.17509/jpp.v17i2.8253. Disponível em: https://ejournal-dppm.upi.edu/jpp/article/view/442. Acesso em: 1 aug. 2026.