1. Adams D.E.(1993).The development of youth ministry as a professional career and the distinctives of liberty university youth ministry training in preparing students for youth work. Doctoral dissertation. Liberty Baptist Theological Seminary VA.
2. Emerging adulthood: A theory of development from the late teens through the twenties.
3. Subcultures or neo‐tribes? Rethinking the relationship between youth, style and musical taste;Bennett A.;Sociology,1999