Setiyawati, Indah, et al. “Relationship Between Baby Gym Frequency on Development In 6-9 Months Aged Infants at Posyandu RW 12 Pademangan Barat North Jakarta”. Menara Journal of Health Science, vol. 2, no. 2, June 2023, pp. 205-1, https://jurnal.iakmikudus.org/article/view/80.