1. Crowder, Norman A.“Automatic Tutoring by Means of Intrinsic Programming,”Automatic Teaching: The State of the Art (New York: John Wiley and Sons, Inc., 1959), pp. 109–16.
2.
2. Lindquist, E. F.Design and Analysis of Experiments in Psychology and Education (Boston: Houghton Mifflin Co., 1953).
3.
3. Lumsdaine, A. A., and Robert Glaser. Teaching Machines and Programmed Learning, A Source Book (Washington, D. C.: National Education Association, 1960).
4.
4. Skinner, B. F.“Teaching Machines,”Science, CXXVII (October, 1958), 969–77.
