ishak, fifi 2021. Literature Study: A Comparison Study of Peanut Ball and Birthing ball to the Progress of Stage 1 Labor in the Active Phase of Maternity. Jurnal Komunitas Kesehatan Masyarakat. 3, 2 (Dec. 2021). DOI:https://doi.org/10.36090/jkkm.v3i2.1160.