WebMD. https://www.webmd.com/a-to-z-guides/discomfort-15/better-sleep/sleep-skin-benefits
Diakses pada Oktober 2018Everyday Health. https://www.everydayhealth.com/skin-and-beauty/amazing-reasons-to-sleep-for-skin-health.aspx
Diakses pada 15 Maret 2019Sleep. https://www.sleep.org/articles/the-real-benefits-of-beauty-sleep/
Diakses pada 15 Maret 2019