ANWAR, Khalidatul Khair; YUSTIARI, Yustiari; HASMIA NANINGSI; ASI, Melania. The Effect of Counter Pressure and Birthball on The Time of The First Stage of Labor and Prevention of Perineal Rupture. Poltekita : Jurnal Ilmu Kesehatan, [S. l.], v. 17, n. 3, p. 647–654, 2023. DOI: 10.33860/jik.v17i3.3042. Disponível em: https://jurnal.poltekkespalu.ac.id/index.php/JIK/article/view/3042. Acesso em: 28 jun. 2025.