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Diakses pada 15 April 2019Healthline. https://www.healthline.com/health/std/syphilis#treatment
Diakses pada 15 April 2019Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/syphilis/diagnosis-treatment/drc-20351762
Diakses pada 15 April 2019SA Health. https://www.sahealth.sa.gov.au/wps/wcm/connect/public+content/sa+health+internet/clinical+resources/clinical+topics/sexually+transmitted+infection+guidelines/syphilis+diagnosis+and+management/management+of+syphilis+during+pregnancy
Diakses pada 15 April 2019