PRASTYO, Dwi; WULANDARI, Fitria Eka. The Effect of Booklets Based on Project Based Learning on Solving Environmental Problems in Junior High Schools . Jurnal Penelitian Pendidikan IPA, [S. l.], v. 9, n. 2, p. 698–705, 2023. DOI: 10.29303/jppipa.v9i2.2612. Disponível em: https://jppipa.unram.ac.id/index.php/jppipa/article/view/2612. Acesso em: 17 apr. 2024.