Sinaga, Rosmani. 2022. “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 (5):3953-57. https://doi.org/10.35335/midwifery.v10i5.1048.