Knight, Rob, 2019
The Independent
Research Reveals Young Children's Strange Sleeping Habits
https://www.independent.co.uk/life-style/health-and-families/young-children-sleeping-habits-study-results-a8845701.html

The National Sleep Foundation
How Much Sleep Do Babies and Kids Need?
https://www.sleepfoundation.org/excessive-sleepiness/support/how-much-sleep-do-babies-and-kids-need

TEEL, Patti, 2018
Psych Central
If Your Child Has Problems, It May Due to Lack of Sleep
https://psychcentral.com/lib/if-your-child-has-problems-it-may-due-to-lack-of-sleep/