Riani Baiduri Siregar, Heri Saputra, Rudi Purwana, Ani Ramahdhani. Pengaruh Tummy Time Exsercise terhadap Peningkatan Motorik Bayi 3 Bulan - 6 Bulan di Klinik Physioroom Medan Selayang . Harmoni [Internet]. 2025 Jul. 29 [cited 2026 Mar. 22];2(3):178-84. Available from: https://pkm.lpkd.or.id/index.php/Harmoni/article/view/1917