Sinaga, Rosmani. “The Influence of Gadgets on Social Development of Pre-School Children in Village Iv Jalan Rejo, Paya Lombang Sub-District, Tebing High District, Serdang Bedagai District Year 2022”. Science Midwifery 10, no. 5 (December 30, 2022): 3953–3957. Accessed April 27, 2026. https://midwifery.iocspublisher.org/index.php/midwifery/article/view/1048.