Damayanti, Ika Putri. “The Correlations of Breathing Techniques With The Progress of Childbirth”. Jurnal kesehatan komunitas (Journal of community health) 3, no. 1 (November 1, 2015): 21–24. Accessed April 26, 2024. https://jurnal.htp.ac.id/index.php/keskom/article/view/96.