1.
Sari TDN. The Effect of Smartphone Usage Intensity on Early Childhood’s Egocentric Behavior and Aggressiveness at Smart Start Preschool Pluit Timur Raya. JSRET [Internet]. 2025 Mar. 20 [cited 2026 Apr. 29];4(1):517-26. Available from: https://jsret.knpub.com/index.php/jrest/article/view/679