SHARA IKA PUTERI, FRANSISCA; RAHARJO. Kelayakan Buku Ajar Berbasis Problem-based Learning (PBL) untuk Melatihkan Keterampilan Berpikir Kritis Siswa SMP. PENSA E-JURNAL: PENDIDIKAN SAINS, [S. l.], v. 7, n. 1, 2019. DOI: 10.26740/pensa.v7i1.26705. Disponível em: https://ejournal.unesa.ac.id/index.php/pensa/article/view/26705. Acesso em: 7 dec. 2025.