1. and Understanding Attitudes and Predicting Social Behavior. Englewood Cliffs, N. J.: Prentice-Hall, 1980.
2. “Dropouts and Turnover: The Synthesis of a Causal Model of Student Attrition.” Unpublished doctoral dissertation, University of Iowa, 1978.
3. “Path Analysis: The Development of a Suitable Methodology for the Study of Student Attrition.” Paper presented at the annual meeting of the American Educational Research Association, San Francisco, April 1979.
4. Dropouts and turnover: The synthesis and test of a causal model of student attrition
5. “Student Attrition, Intentions, and Confidence: Interaction Effects in a Path Model (R2 = .51).” Paper presented at the annual meeting of the American Research Association, Los Angeles, April 1981.