ZUNIKA, Zunika. Model Problem Based Learning untuk Meningkatkan Karakter Percaya Diri Siswa SDN 18 Pangkalpinang. Global Journal Teaching Professional, [S. l.], v. 1, n. 1, p. 1–9, 2022. Disponível em: https://jurnal.sainsglobal.com/index.php/gpp/article/view/495. Acesso em: 19 apr. 2026.