WebMD. https://www.webmd.com/a-to-z-guides/discomfort-15/better-sleep/healing-power-sleep?page=1
Diakses pada Oktober 2018Very Well Health. https://www.verywellhealth.com/top-health-benefits-of-a-good-nights-sleep-2223766
Diakses pada 28 Februari 2019Health. https://www.health.com/health/gallery/0,,20459221,00.html?slide=125268#125268
Diakses pada 28 Februari 2019Help Guide. Sleep Need. https://www.helpguide.org/articles/sleep/sleep-needs-get-the-sleep-you-need.htm. Diakses pada 5 Agustus 2020