4Danah M.Boyd,Nicole B.Ellison.Social Network Sites: Definition, History, and Scholarship[J].Journal of Computer‐Mediated Communication.2007(1)
5John F. Ryan.The Relationship Between Institutional Expenditures and Degree Attainment at Baccalaureate Colleges[J].Research in Higher Education.2004(2)
6Eric A. Hanushek.Assessing the Effects of School Resources on Student Performance: An Update[].Educational Evaluation and Policy Analysis.1997