Everyday Health. https://www.everydayhealth.com/digestive-health/dealing-with-a-sensitive-gut.aspx
Diakses pada 8 Juli 2019Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/peptic-ulcer/symptoms-causes/syc-20354223
Diakses pada 8 Juli 2019WebMD. https://www.webmd.com/digestive-disorders/understanding-ulcers-basic-information#1
Diakses pada 8 Juli 2019Very Well Health. https://www.verywellhealth.com/abdominal-swelling-and-bloating-514429#the-most-common-causes
Diakses pada 8 Juli 2019Healthfully. https://healthfully.com/expel-extreme-bloating-elderly-women-8339589.html
Diakses pada 8 Juli 2019Healthline. https://www.healthline.com/health/abdominal-bloating#when-to-seek-help
Diakses pada 8 Juli 2019