Siharina, Febby, Istiqamah Istiqamah, and Ahmad Hidayat. “Pengaruh Teknik Birth Ball Terhadap Pengurangan Nyeri Persalinan: Literature Review”. Proceeding Of Sari Mulia University Midwifery National Seminars 4, no. 1 (July 30, 2022). Accessed March 29, 2024. https://ocs.unism.ac.id/index.php/PROBID/article/view/850.