Sources

http://www.livestrong.com/article/180598-moral-social-development-in-infants/

http://www.kamloopschildrenstherapy.org/social-emotional-infant-milestones

http://www.kidspot.com.au/familyhealth/Development-Babys-first-year-Baby-social-and-emotional-development-newborn-to-3-months+2670+212+article.htm

http://www.cyh.com/HealthTopics/HealthTopicDetails.aspx?p=114&np=122&id=1963

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