Satriyandari, Yekti, and Fathiyatur Rohmah. “Science and Technology for the Community: Training and Examination of Toddler Development at PGTK Khalifah, Sleman-Yogyakarta”. Urecol Journal. Part F: Community Development 1, no. 1 (April 20, 2021): 7–15. Accessed April 29, 2024. https://e-journal.urecol.org/index.php/ujcd/article/view/39.