Fitri, Risqy Nur, and Magdalena Tri Putri. “Pengaruh Tummy Time Menggunakan Playmat Terhadap Perkembangan Motorik Kasar Pada Bayi Usia ≤ 6 Bulan”. Innovative: Journal Of Social Science Research 5, no. 4 (August 26, 2025): 9743–9754. Accessed June 28, 2026. https://j-innovative.org/index.php/Innovative/article/view/21070.