“Pengaruh Teknik Birth Ball Terhadap Pengurangan Nyeri Persalinan: Literature Review ” (2022) Proceeding Of Sari Mulia University Midwifery National Seminars, 4(1). Available at: https://ocs.unism.ac.id/index.php/PROBID/article/view/850 (Accessed: 27 July 2024).