WebMD. https://www.webmd.com/sleep-disorders/guide/hypersomnia#1-2
Diakses pada Mei 2019Harvard Medical School. http://healthysleep.med.harvard.edu/healthy/science/how/external-factors
Diakses pada Mei 2019WebMD. https://www.webmd.com/sleep-disorders/news/20110119/light-exposure-may-cut-production-of-melatonin
Diakses pada Mei 2019National Sleep Foundation. https://www.sleep.org/articles/how-lights-affect-sleep/
Diakses pada Mei 2019All About Vision. https://www.allaboutvision.com/cvs/blue-light.htm
Diakses pada Mei 2019Healthline. https://www.healthline.com/nutrition/block-blue-light-to-sleep-better#blue-light
Diakses pada Mei 2019National Sleep Foundation. https://www.sleepfoundation.org/articles/how-blue-light-affects-kids-sleep
Diakses pada Mei 2019Harvard Medical School. https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side
Diakses pada Mei 2019Everyday Health. https://www.everydayhealth.com/sleep/too-much-light-ruining-not-just-your-sleep-but-your-health-too.aspx
Diakses pada Mei 2019