1. Altus, D. E. (1984, May). Rule 6 - Program cultural behavior: Talking about long-term consequences. In J. G. Holland (Chair), Creating a self-maintaining token economy: An experimental demonstration of some rules. Symposium conducted at the convention of the Association for Behavior Analysis, Nashville, TN.
2. Altus, D. E. (1990, April). Co-ops past and present: A look at where we came from and where we are today. Paper presented at the Kansas-Missouri regional meeting of the Ozark Cooperative Warehouse, Lawrence, KS.
3. Baer, D. M., Wolf, M. M., & Risley, T. R. (1968). Some current dimensions of applied behavior analysis. Journal of Applied Behavior Analysis, 1, 91–97. https://doi.org/10.1901/jaba.1968.1-91
4. Blase, K., Fixsen, D., & Phillips, E. (1984). Residential treatment for troubled children: Developing service delivery systems. In S. C. Paine, G. T. Bellamy, & B. Wilcox (Eds.), Human services that work: From innovation to standard practice (pp. 149–166). Baltimore: Brookes.
5. Bonner, A. (1970). British cooperation. The history, principles and organization of the British cooperative movement. Manchester, England: Cooperative Union.