RAHMAWATI, Fita; MUHTADI, Ali. A Development of Integrative Thematic Textbook with Problem-Based Learning to Improve the Critical-Thinking Ability of Elementary Students at Grade IV. KnE Social Sciences, [S. l.], v. 3, n. 17, p. 334–341, 2019. DOI: 10.18502/kss.v3i17.4655. Disponível em: https://knepublishing.com/index.php/KnE-Social/article/view/4655. Acesso em: 11 jul. 2025.