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, vol. 10, no. 5, Dec. 2022, pp. 3953-7, doi:10.35335/midwifery.v10i5.1048.