ASTRI, A.; PURNAMA, I.; BAKARI, D. H. Cognitive development analysis of 3-year-old children in the aspect of simple problem-solving. JECCE (Journal of Early Childhood Care and Education), [S. l.], v. 9, n. 1, p. 62–69, 2026. DOI: 10.26555/jecce.v9i1.15513. Disponível em: http://journal2.uad.ac.id/index.php/jecce/article/view/15513. Acesso em: 29 oct. 2026.