References
- Edwards, A. L. Experimental Design in Psychological Research, New York: Rinehart and Company, 1950.
- McNemar, Q. Psychological Statistics, New York: John Wiley, 1949.
- Roe, A., Massey, Mildred, Weltman, G., and Leeds, D. “Automated Teaching Methods Using Linear Programs,” Report Number 60-105, Department of Engineering, University of California (Los Angeles), December, 1960.