SARI, T. D. N. The Effect of Smartphone Usage Intensity on Early Childhood’s Egocentric Behavior and Aggressiveness at Smart Start Preschool Pluit Timur Raya. Journal of Scientific Research, Education, and Technology (JSRET), [S. l.], v. 4, n. 1, p. 517–526, 2025. DOI: 10.58526/jsret.v4i1.679. Disponível em: https://jsret.knpub.com/index.php/jrest/article/view/679. Acesso em: 29 apr. 2026.