1. The Prediction of Academic Success and Early Attrition by Means of a Multiple-Choice Biographical Inventory
2. The American College Testing Program. College Student Retention—A Team Report. Iowa City: The American College Testing Program, 1975.
3. College Dropouts: A National Profile. Washington, D. C.: American Council on Education, 1972.
4. Preventing Students from Dropping Out. San Francisco: Jossey-Bass, 1975.