3[1]Austin,A.W.(1993).What Matters in College:Four Critical Years Revisited.San Francisco:Jossey-Bass
4[2]Chickering,A.W.and L.Reisser.(1993).Education and Identity.2nd ed.San Francisco:Jossey-Bass
5[3]Kuh,G.(1993),"In Their Own Words:What Students Learn Outside the Classroom.",American Educational Research Journal 30,277-304
6[4]Kuh,G.,J.Schuh,E.Whitt and Associates.(1991).Involving Colleges:Successful Approaches to F0stering Student Learning and Development Outside the Classroom.San Francisco:Jossey-Bass
7[5]Marsh,H.(1992).Extracurricular activities:Beneficial extension of the traditional curriculum or subversion of academic goals? Journal of Educational Psychology,84(4),553-562
8[6]Pascarella,E.and P.Terenzini.(1991).How College Affects Students:Findings and Insights From Twenty Years of Research.San Francisco:Jossey-Bass