SHERLLY, P.; JAMIL, J.; SOPYAN, M. Constraints in The Implementation of Problem-Based Learning in Subject of History in State Senior High School 2 Sendawar. Yupa: Historical Studies Journal, [S. l.], v. 2, n. 1, p. 26–32, 2018. DOI: 10.30872/yupa.v2i1.113. Disponível em: https://jurnal.fkip.unmul.ac.id/index.php/yupa/article/view/113. Acesso em: 4 apr. 2025.