1. Ault, M. J., Wolery, M., Gast, D. L., Doyle, P. M., & Martin, C. P. (1990). Comparison of predictable and unpredictable trial sequences during small-group instruction.Learning Disability Quarterly, 13, 12–29.
2. Bernstein, L., Schachter, M., Winkler, A., & Wolfe, S. (1986).Concepts and challenges in life science. New York: Globe.
3. Billingsley, F. F., White, O. R., & Munson, R. (1980). Procedural reliability: A rationale and an example.Behavior Assessment, 2, 229–241.
4. Brigance, A. H. (1977).Brigance diagnostic inventory of basic skills. N. Billerica, MA: Curriculum Associates, Inc.
5. Collins, B. C., Gast, D. L., Ault, M. J., & Wolery, M. (1991). Small group instruction: Guidelines for teachers of students with moderate to severe handicaps.Education and Training in Mental Retardation, 26, 18–32.