1. Adelman, C. (1999). Answers in the tool box. Washington, DC: US Department of Education.
2. Adelman, C. (2004). Principal indicators of student academic histories in postsecondary education, 1972–2000. Washington, DC: US Department of Education.
3. Adelman, C. (2006). The toolbox revisited: Paths to degree completion from high school through college. Washington, DC: US Department of Education.
4. Astin, A. (1984). Student involvement: A developmental theory for higher education. Journal of College Student Personnel,
25(3), 297–308.
5. Attewell, P., & Domina, T. (2008). Raising the bar: Curricular intensity and academic performance. Educational Evaluation and Policy Analysis,
30(1), 51–71.