Purwanti, Heni, et al. “The Effect of Brain Gymnastics on Fine Motor Skills in Children at Al Kautsar Islamic Kindergarten in South Jakarta City in 2024”. Jurnal Kesehatan Budi Luhur: Jurnal Ilmu-Ilmu Kesehatan Masyarakat, Keperawatan, Dan Kebidanan, vol. 18, no. 2, July 2025, pp. 42-48, doi:10.62817/jkbl.v18i2.413.