1. Guerin, B. (1994).Analyzing social behavior. Reno, NV: Context Press.
2. Shulman, K. & Feinstein, A. (2003).Quick Cognitive Screening for Clinicians. London: Martin Dunitz.
3. Sidman, M. (1994).Equivalence relations and behavior: A research story. Boston, MA: Authors Cooperative.
4. Tierney, K. J. & Bracken, M. (1998). Stimulus equivalence and behavior therapy. In W. O’Donohue (Ed.),Learning and behavior therapy(pp. 392–402). Boston: Allyn & Bacon.