IDAWATI; NINGSIH, A.; JULIYANTI, A.; ERVINA; ZAHARA, R. Midwife’s knowledge level and delivery ball techniques on labor pain. International Journal on ObGyn and Health Sciences, [S. l.], v. 1, n. 3, p. 86–91, 2023. DOI: 10.35335/obgyn.v1i3.103. Disponível em: https://trigin.pelnus.ac.id/index.php/ObGyn/article/view/103. Acesso em: 30 jul. 2026.