Mayo Clinic Staff. Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) - Symptoms and causes. 2023. URL: https://www.mayoclinic.org/diseases-conditions/chronic-fatigue-syndrome/symptoms-causes/syc-20360490 (visited on 2023-12-07).
I chose this source because it makes invisible disability easier to understand. ME/CFS can seriously affect a person even if other people cannot see it, and symptoms can change over time. That connects well to the chapter’s point that not all disabilities are obvious from the outside.