FADHILA, N.; WASTUTI, S. N. Y.; ASTUTI, S. THE APPLICATION OF PROBLEM-BASED LEARNING TECHNIQUES IN CLASSICAL SERVICES TO INCREASE SELF-CONFIDENCE. Algebra : Jurnal Pendidikan, Sosial dan Sains, [S. l.], v. 5, n. 2, p. 226–232, 2025. DOI: 10.58432/algebra.v5i2.1267. Disponível em: https://ejournal.yana.or.id/index.php/algebra/article/view/1267. Acesso em: 19 apr. 2026.