Healthline. https://www.healthline.com/health-news/asthma-in-older-adults-undertreated
Diakses pada Oktober 2018NCBI. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3345322/ Diakses pada 5 Maret 2019Asthma and Allergies. http://asthmaandallergies.org/asthma-allergies/asthma-in-older-adults/ Diakses pada 5 Maret 2019Get Asthma Help. https://getasthmahelp.org/asthma-seniors-health-professional.aspx# Diakses pada 5 Maret 2019