Rewanta Cahya Mita, Siti Muawanah, M. Zuhal Purnomo. The Effect Of Use Of Birthing Ball On Reducing Back Pain Of Pregnant Women In Third Trimester At Kudus In 2023. PHJ [Internet]. 2024 May 12 [cited 2025 Mar. 1];6(1):20-7. Available from: https://ojsstikesbanyuwangi.com/index.php/PHJ/article/view/488