4Braxton,J.,and Hirschy,A.Theoretical developments in the study of college student departure.In ASeidman (EcL), College student retention: Formula for student success [M].Westport, CT: ACE/Praeger.2005.
6Rudenstine,N.Student diversity in higher education.In G.Orfield (Ed.).Diversity challenged: Evidence on the impact of affirmative action [M].Cambridge: Harvard Education Publishing Group.2001.
