Khasanah, Nurun, and Wiwit Sulistyawati. “Pengaruh Endorphin Massage Terhadap Intensitas Nyeri Pada Ibu Bersalin”. Journal for Quality in Women’s Health 3, no. 1 (March 15, 2020): 15-21. Accessed October 1, 2020. https://jqwh.org/index.php/JQWH/article/view/43.