1. Adelman, C. (1999). Answers in the toolbox: Academic intensity, attendance patterns, and bachelor’s degree attainment. Washington, DC: U.S. Department of Education, Office of Educational Research and Improvement.
2. Adelman, C. (2006). The toolbox revisited: Paths to degree completion from high school through college. Washington, DC: U.S. Department of Education, Office of Educational Research and Improvement.
3. Barker, M. J. (2007). Cross-cultural mentoring in institutional contexts. Negro Educational Review, 58(1–2), 85–103.
4. Bean, J. P., & Metzner, B. S. (1985). A conceptual model of nontraditional undergraduate student attrition. Review of Educational Research, 55(4), 485–540.
5. Braxton, J. M. (Ed.). (2002). Reworking the student departure puzzle. Nashville, TN: Vanderbilt University Press.