The book "plugged in" : https://yalebooks.yale.edu/book/9780300218879/plugged
AAP Family Media Plan:https://www.healthychildren.org/English/media/Pages/default.aspx
AAP Recommendations for Media Use: http://pediatrics.aappublications.org/content/138/5/e20162591
Common Sense Media: https://www.commonsensemedia.org/