http://www.solutionsforchildproblems.com/aggressive-behavior-children.html
"Aggressive Behavior in Toddlers." ZERO TO THREE. National Center for Infants, Toddlers and Families. Web. 30 Aug. 2011. <http://www.zerotothree.org/child-development/challenging-behavior/aggressive-behavior.html#respond>.
"Child Behavior: What Parents Can Do to Change Their Child's Behavior -- Familydoctor.org." Familydoctor.org. American Academy of Family Physicians. Web. 30 Aug. 2011. <http://familydoctor.org/online/famdocen/home/children/parents/behavior/201.html>.