Trussell, James (Mayıs 2011). "Contraceptive failure in the United States". Contraception. 83 (5). ss. 397-404. doi:10.1016/j.contraception.2011.01.021. PMC3638209 $2. PMID21477680. Trussell, James (2011). "Contraceptive efficacy". Hatcher, Robert A.; Trussell, James; Nelson, Anita L.; Cates, Willard Jr.; Kowal, Deborah; Policar, Michael S. (Ed.). Contraceptive technology (20th revised bas.). New York: Ardent Media. ss. 779-863. ISBN978-1-59708-004-0. ISSN0091-9721. OCLC781956734.
Van der Wijden, C; Manion, C (12 Ekim 2015). "Lactational amenorrhoea method for family planning". The Cochrane Database of Systematic Reviews, 10. ss. CD001329. doi:10.1002/14651858.CD001329.pub2. PMC6823189 $2. PMID26457821.
American College of Obstetricians and Gynecologists. (2017). Sterilization of Women: Ethical Issues and Considerations. Ethics Committee Opinion No. 695. Obstetrics & Gynecology, 130(5), e275–e281. https://doi.org/10.1097/AOG.0000000000002408
Van der Wijden, C; Manion, C (12 Ekim 2015). "Lactational amenorrhoea method for family planning". The Cochrane Database of Systematic Reviews, 10. ss. CD001329. doi:10.1002/14651858.CD001329.pub2. PMC6823189 $2. PMID26457821.