IDRUS NABU; SARSON W. POMALATO; TEDY MACHMUD. DEVELOPMENT OF PROBLEM-BASED LEARNING DEVICES ON MATHEMATICS AND TRIANGLE MATERIALS FOR JUNIOR HIGH SCHOOL STUDENTS CLASS VII AT JUNIOR HIGH SCHOOL 5 PAGUYAMAN. European Journal of Humanities and Educational Advancements, [S. l.], v. 3, n. 8, p. 186-193, 2022. Disponível em: https://scholarzest.com/index.php/ejhea/article/view/2622. Acesso em: 10 jan. 2025.