Telova, Y. “The Effect Of Counterpressure Birth Ball On The Reduction Of Labor Pain In Bpm Maiharti Kisaran Barat In 2022”. JURNAL KEBIDANAN KESTRA (JKK), vol. 5, no. 1, Oct. 2022, pp. 161-5, doi:10.35451/jkk.v5i1.1342.