1. What Matters in College: Four Critical Years Revisited;Astin,1993
2. Work-Study: Time Use Trade Offs, Student Work Hours and Implications for Youth Employment Policyhttp://www.atususers.umd.edu/wip2/papers_i2007/Golden.pdf
3. Human Capital Revisited;Becker,1994
4. Motives of volunteering and values of work among higher education students
5. “A pedagógushallgatók késleltetett diplomaszerzése interjúk alapján.” [The Discovery of the Possible Reasons for Delayed Graduation and Dropout in the Light of a Qualitative Research Study];Bocsi,2018