suryani, L., and A. Rosyada. “The Effect of Unintended Pregnancy Among Married Women on the Length of Breastfeeding in Indonesia”. Jurnal Ilmu Kesehatan Masyarakat, vol. 11, no. 2, July 2020, pp. 136-49, doi:10.26553/jikm.2020.11.2.136-149.