1. Barrett, B. H., Johnston, J. M., & Pennypacker, H. S. (1986). Behavior: Its units, dimensions, and measurement. In R. O. Nelson & S. C. Hayes (Eds.), Conceptual foundations of behavioral assessment (pp. 156–200). New York: Guilford.
2. Bentley, A. F. (1941). The behavioral superfice. Psychological Review, 48, 39–59.
3. Engel, G. L. (1980). The clinical application of the biopsychosocial model. American Journal of Psychiatry, 137, 535–544.
4. Givón, T. (1984). Syntax: A functional typological introduction. Amsterdam/Philadelphia: John Benjamins Publishing Company.
5. Hineline, P. N. (1980). The language of behavior analysis: Its community, its functions, and its limitations. Behaviorism, 8, 67–86.