Sari, Zelda Mulia, et al. “Asuhan Kebidanan Pada Ny. W Inpartu Kala I Fase Aktif Dengan Birth Ball: Midwifery Care for Mrs. W Inpartu in the First Active Phase With Birth Ball”. Bunda Edu-Midwifery Journal (BEMJ), vol. 8, no. 1, Dec. 2024, pp. 253-9, doi:10.54100/bemj.v8i1.288.