1[1]Altbach, P. G. 1985. Higher Education: Comparative Studies. Torsten Husen. The International Encyclopedia of Education:Research and Studies. Volume 4. F-H. 1985: 2195.
2[3]Brubacher, J. S. Rudy, W. 1976. Higher Education in Transition. Harper &Row,publishers,Inc.1976: 175.