Trussell J (2011). "Contraceptive Efficacy."(PDF). In Hatcher RA, Trussell J, Nelson AL, Cates W, Kowal D, Policar M (eds.). Contraceptive Technology (Twentieth Revised ed.). New York NY: Ardent Media. Archived from the original(PDF) on 2017-02-15. Retrieved 2019-07-13.
doi.org
Cottrell, BH (Mar–Apr 2010). "An updated review of evidence to discourage douching". MCN: The American Journal of Maternal/Child Nursing. 35 (2): 102–7, quiz 108–9. doi:10.1097/NMC.0b013e3181cae9da. PMID20215951. S2CID46715131.
Cottrell, B. H. (2010). "An Updated Review of Evidence to Discourage Douching". MCN: The American Journal of Maternal/Child Nursing. 35 (2): 102–107, quiz 107–9. doi:10.1097/NMC.0b013e3181cae9da. PMID20215951. S2CID46715131.
Cottrell, BH (Mar–Apr 2010). "An updated review of evidence to discourage douching". MCN: The American Journal of Maternal/Child Nursing. 35 (2): 102–7, quiz 108–9. doi:10.1097/NMC.0b013e3181cae9da. PMID20215951. S2CID46715131.
Cottrell, B. H. (2010). "An Updated Review of Evidence to Discourage Douching". MCN: The American Journal of Maternal/Child Nursing. 35 (2): 102–107, quiz 107–9. doi:10.1097/NMC.0b013e3181cae9da. PMID20215951. S2CID46715131.
Cottrell, BH (Mar–Apr 2010). "An updated review of evidence to discourage douching". MCN: The American Journal of Maternal/Child Nursing. 35 (2): 102–7, quiz 108–9. doi:10.1097/NMC.0b013e3181cae9da. PMID20215951. S2CID46715131.
Cottrell, B. H. (2010). "An Updated Review of Evidence to Discourage Douching". MCN: The American Journal of Maternal/Child Nursing. 35 (2): 102–107, quiz 107–9. doi:10.1097/NMC.0b013e3181cae9da. PMID20215951. S2CID46715131.
Trussell J (2011). "Contraceptive Efficacy."(PDF). In Hatcher RA, Trussell J, Nelson AL, Cates W, Kowal D, Policar M (eds.). Contraceptive Technology (Twentieth Revised ed.). New York NY: Ardent Media. Archived from the original(PDF) on 2017-02-15. Retrieved 2019-07-13.