Pardede, G. and Damanik, B.A.R. 2025. THE INFLUENCE OF SLEEP HABITS ON COGNITIVE FUNCTIONS IN THE SPEECH OF PRESCHOOL CHILDREN. Sindoro: Cendikia Pendidikan. 11, 10 (Jan. 2025), 11–21. DOI:https://doi.org/10.9644/sindoro.v11i10.10114.