Haryani, M. H. T.; Anggesti, I.; Situmeang, M.; Apriliya, D.; A’yuni, N.; Eliska, E. Relationship Between Gadget Use and Learning Concentration Kedai Damar Village, Tebing Tinggi Subdistrict, Serdang Bedagai Regency. Indones. Berdaya. 2023, 4, 1657-1660.