Berkner, L.K., Cuccaro-Alamin, S., and McCormick, A.C. (1996). Descriptive Summary of 1989–90 Beginning Postsecondary Students 5 Years Later: With an Essay on Postsecondary Persistence and Attainment (NCES 96–155). U.S. Department of Education, National Center for Education Statistics. Washington, DC: U.S. Government Printing Office.

Berkner, L.K., He, S., and Cataldi, E.F. (2002). Descriptive Summary of 1995–96 Beginning Postsecondary Students Six Years Later (NCES 2003–151). U.S. Department of Education, National Center for Education Statistics. Washington, DC: U.S. Government Printing Office.

Carroll, C.D. (1989). College Persistence and Degree Attainment for 1980 High School Graduates: Hazards for Transfers, Stopouts, and Part-Timers (NCES 89–302). U.S. Department of Education, National Center for Education Statistics. Washington, DC: U.S. Government Printing Office.

Horn, L.J. (1996). Nontraditional Undergraduates: Trends in Enrollment from 1986 to 1992 and Persistence and Attainment Among 1989–90 Beginning Postsecondary Students (NCES 97–578). U.S. Department of Education, National Center for Education Statistics. Washington, DC: U.S. Government Printing Office.

Tuma, J., and Geis, S. (1995). Educational Attainment of 1980 High School Sophomores by 1992 (NCES 95–304). U.S. Department of Education, National Center for Education Statistics. Washington, DC: U.S. Government Printing Office.