Mu'alimah, Miftakhul, and Putri Wahyu Wigati. “The Effect of the Use of Birthing Ball on the Progress of First Stage Childbirth on Primigravida”. Journal for Quality in Public Health 5, no. 2 (May 31, 2022): 626–631. Accessed March 28, 2024. https://jqph.org/index.php/JQPH/article/view/292.