Healthline. https://www.healthline.com/nutrition/20-natural-laxatives
Diakses pada 17 Juni 2020
Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/constipation/in-depth/laxatives/art-20045906
Diakses pada 17 Juni 2020
NHS. https://www.nhs.uk/conditions/laxatives/
Diakses pada 17 Juni 2020
Family Doctor. https://familydoctor.org/laxatives-otc-products-for-constipation/
Diakses pada 17 Juni 2020
Medical News Today. https://www.medicalnewstoday.com/articles/10279
Diakses pada 17 Juni 2020