UTAMI, W. M. P.; NIRMALA, N. INVESTIGATING THE IMPACT OF PROBLEM BASED LEARNING ON THE TENTH GRADE STUDENTS’ SPEAKING SKILL. JIPIS, [S. l.], v. 33, n. 2, p. 145–152, 2024. DOI: 10.33592/jipis.v33i2.7224. Disponível em: https://ejournal.unis.ac.id/index.php/JIPIS/article/view/7224. Acesso em: 3 apr. 2025.