Parents. https://www.parents.com/getting-pregnant/i-got-pregnant-on-depo-provera/
Diakses 21 Oktober 2020Planned Parenthood. https://www.plannedparenthood.org/learn/birth-control/birth-control-shot/how-effective-is-the-birth-control-shot
Diakses 21 Oktober 2020Your Life. https://www.your-life.com/en/contraception-methods/short-acting-contraception/contraceptive-injection/
Diakses 21 Oktober 2020The Family Planning Association (FPA) - United Kingdom. https://www.fpa.org.uk/sites/default/files/contraceptive-injections-your-guide.pdf
Diakses 21 Oktober 2020