PUTRI, Amelia; PUTRA, Amali. Pengembangan LKPD Model Problem Based Learning Berorientasi Aktivitas Berpikir Kritis Pada Materi Getaran, Gelombang, dan Bunyi di Kelas VIII SMPN 3 Padang. Universe, [S. l.], v. 2, n. 1, p. 45–51, 2021. DOI: 10.24036/universe.v2i1.42. Disponível em: http://universe.ppj.unp.ac.id/index.php/universe/article/view/42. Acesso em: 18 apr. 2026.