Healthline. https://www.healthline.com/health/rectal-bleeding
Diakses pada 12 September 2020Mayo Clinic. https://www.mayoclinic.org/symptoms/rectal-bleeding/basics/definition/sym-20050740
Diakses pada 12 September 2020NHS. https://www.nhs.uk/conditions/bleeding-from-the-bottom-rectal-bleeding/
Diakses pada 12 September 2020