ASTRIKA, G.; PANGGAYUH, A.; MARDIYANTI, T. The Effect Of Birthing Ball On The Duration Of Active Phase In Primigravida At Pmb Yulis Indriana, Malang. Jurnal Pendidikan Kesehatan (e-Journal), [S. l.], v. 8, n. 2, p. 164–175, 2019. DOI: 10.31290/jpk.v8i2.1021. Disponível em: https://ojs.poltekkes-malang.ac.id/jpk/article/view/1021. Acesso em: 24 oct. 2025.