Satriyandari, Yekti, and Fathiyatur Rohmah. 2021. “Science and Technology for the Community: Training and Examination of Toddler Development at PGTK Khalifah, Sleman-Yogyakarta”. Urecol Journal. Part F: Community Development 1 (1):7-15. https://doi.org/10.53017/ujcd.39.