Rohaya, Rohaya, et al. “The Effect Of Counterpressure With A Birthball On Reducing Labor Pain During The First Active Phase: The Effect Of Counterpressure With A Birthball On Reducing Labor Pain During The First Active Phase”. NURSING UPDATE : Jurnal Ilmiah Ilmu Keperawatan P-ISSN : 2085-5931 E-ISSN : 2623-2871, vol. 15, no. 1, Mar. 2024, pp. 114-23, doi:10.36089/nu.v15i1.1966.