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MEGASARI, M.; Maryati, S.; Septiani, D. PENGARUH GADGET DAN BOOKLET TERHADAP KUALITAS TIDUR ANAK DI SD NEGERI LINGGABUDI CIMAHI: The Influence of Gadgets and Booklets on Children’s Sleep Quality at Linggabudi Elementary School, Cimahi. jkkes 2025, 20, 189-195.