ANWAR, A.; RATNANINGSIH, A. .; YANSAPUTRA, G. . Meningkatkan Kerjasama dan Hasil Belajar Matematika Melalui Model PBL Kelas IV MI. Journal of Digital Learning and Education, Deli Serdang, Indonesia, v. 1, n. 1, p. 33-38, 2021. DOI: 10.52562/jdle.v1i01.21. Disponível em: https://journal.moripublishing.com/index.php/jdle/article/view/21. Acesso em: 18 apr. 2026.