Sumule, Arsiaty, and Andre Bastian Mani. “Knowledge and Attitude of Mothers on Operative Medical Acceptance of Women As a Contraceptive Option in the Work Area of Sindar Raya Puskesmas, Semalungun District”. Science Midwifery, vol. 10, no. 5, Dec. 2022, pp. 3964-7, doi:10.35335/midwifery.v10i5.1028.