1. Appraisal Institute. (1996). The Appraisal of Real Estate 11th Edition. Chicago, IL: Appraisal Institute.
2. Appraisal Institute. (2001). The Appraisal of Real Estate 12th Edition. Chicago, IL: Appraisal Institute.
3. Cook, Thomas and Donald Campbell. (1976). “The Design and Conduct of Quasi-Experiments and True Experiments in Field Settings.” in Marvin Dunnette The Handbook of Industrial and Organizational Psychology, Chicago: Rand-McNally.
4. Diaz, Julian III. (1987). Processing Tracing Investigation into Problem Solving within Residential Real Estate Appraisal, Dissertation, Georgia State University.
5. Diaz, Julian III. (1990a). “How Appraisers Do Their Work: A Test of the Appraisal Process and the Development of a Descriptive Model.” The Journal of Real Estate Research 5:1, 1–15.