1. Astin, A.W. Preventing students from dropping out. San Francisco: Jossey-Bass, 1975.
2. Astin, A.W. Student involvement: A developmental theory for higher education. Journal of College Student Personnel, 1984, 25, 297–308.
3. Billson, J.M., & Brooks-Terry, M. In search of the silken purse: Career orientation vs. liberal arts orientation among first generation college students. College and University, 1985, 8, 57–75.
4. Billson, J.M., & Brooks-Terry, M. Clientele for a changing era in higher education: Retention strategies for first-generation students. Paper presented at the New England Conference on Educational and Occupational Counseling of Adults. Shrewsbury, MA, 1985.
5. Billson, J.M. A student retention model for higher education. College and University, 1987, 2, 290–305.