TOYYIBAH, Nur Lindah; TRIYANDANA, Arga; SAFITRI, Nur Lina. Effect of Problem Based Learning Model Based on Roundhouse Diagram on Students’ Problem Solving Ability SMA Negeri 1 Gondangwetan Ecosystem Material Class X. Center of Education Journal (CEJou), [S. l.], v. 5, n. 2, 2025. DOI: 10.55757/cejou.v5i02.583. Disponível em: https://ejournal.unupasuruan.ac.id/index.php/cejou/article/view/583. Acesso em: 17 oct. 2026.