WebMD. https://teens.webmd.com/girls/all-about-menstruation#2
Diakses pada 15 Oktober 2020
NHS. https://www.nhs.uk/common-health-questions/womens-health/what-causes-bleeding-between-periods/
Diakses pada 15 Oktober 2020
Healthline. https://www.healthline.com/health/womens-health/two-periods-in-one-month
Diakses pada 15 Oktober 2020
Medical News Today. https://www.medicalnewstoday.com/articles/322252
Diakses pada 15 Oktober 2020
Health. https://www.health.com/condition/menstruation/can-you-get-a-pap-smear-on-your-period
Diakses pada 15 Oktober 2020
Flo. https://www.health.com/condition/menstruation/can-you-get-a-pap-smear-on-your-period
Diakses pada 15 Oktober 2020
Health Direct. https://www.healthdirect.gov.au/bleeding-between-periods
Diakses pada 15 Oktober 2020