1[1]The World's Youth,Chapter 11,Adolescence in Global Perspective.By T.S.Saraswathi and Reed W..Larson.
2[2]Adolescents'Preparation for The Future.Adolescent Health and WelBeing in the Tweenty- First Century:A Global Perspective.By Kathleen Thiede Call,Aylin Altan Riedel,Karen Hein,Vonnie Mcloyd,Anne Petersen,and Michele Kipke