FITRIANI, F.; NURHUDA, N.; INA, A. I. Improving students’ activeness and critical thinking skills through problem based learning. Journal of Science and Education (JSE), [S. l.], v. 2, n. 1, p. 19-29, 2021. DOI: 10.56003/jse.v2i1.60. Disponível em: https://jse.rezkimedia.org/index.php/jse/article/view/60. Acesso em: 19 may. 2022.