Birting Ball Exercise terhadap Nyeri Persalinan Kala I. Jurnal Kesmas Asclepius, [S. l.], v. 4, n. 2, p. 89–95, 2022. DOI: 10.31539/jka.v4i2.4700. Disponível em: https://journal.ipm2kpe.or.id/index.php/JKA/article/view/4700. Acesso em: 9 jan. 2026.