Astuti, S.C.D. and Sari, R.T. 2022. The Effect of Using Endorphin Massage for Decreasing Pain at First Stage in Normal Labor . JURNAL INFO KESEHATAN. 20, 2 (Dec. 2022), 194–205. DOI:https://doi.org/10.31965/infokes.Vol20.Iss2.877.