1. 11 Million Teenagers: What Can Be Done about the Epidemic of Adolescent Pregnancies in the United States;Alan Guttmacher,1976
2. Early Intervention: Good Parents, Great Kids, Better Citizens;Allen,2009
3. Facts for Families: the Teen Brain: Behavior, Problem Solving, and Decision Making;American Academy of Child and Adolescent Psychiatry,2011
4. British policy on teenage pregnancy and childbearing: the limitations of comparisons with other European countries;Arai;Crit. Soc. Policy,2003
5. Centuries of Childhood;Aries,1962