1. Ayllon, T., & Azrin, N. (1968). The token economy: A motivational system for therapy and rehabilitation. Appleton-Century-Crofts.
2. Albers, A. E., & Greer, R. D. (1991). Is the three-term contingency trial a predictor of effective instruction? Journal of Behavioral Education, 1, 337–354. https://doi.org/10.1007/BF00947188
3. Baldonado, L. A. (2021). Increased complexity in bidirectional naming stimulus control enhances reading in first graders. [Doctoral dissertation, Columbia University]. Columbia University Commons.
4. Bishop, J. H. (1989). Is the test score decline responsible for the productivity growth decline? American Economic Journal, 79(1), 178–197.
5. Cavanaugh, R. A., Heward, W. L., & Donelson, F. (1996). Effects of response cards during lesson closure on the academic performance of secondary students in an earth science course. Journal of Applied Behavior Analysis, 29(3), 403–406.