SAFIAH, I.; YUNUS, M.; ZAKI, A.; AHADIN; HASNIYATI. Development of Ubiquitous Project-Based Learning (U-Pjbl) Model to Improve Critical Thinking Skills of Elementary School Students. Journal of Learning for Development , [S. l.], v. 12, n. 2, p. 313–329, 2025. DOI: 10.56059/jl4d.v12i2.1358. Disponível em: https://www.jl4d.org/index.php/ejl4d/article/view/1358. Acesso em: 21 apr. 2026.