1. Abbott A. Ch 1: Introduction & Ch 2: Professional work. In The system of profession. An essay on the divison of expert labor. University of Chicago Press, Chicago 1988; 1–58
2. Viewpoint:
3. Bruning RH, Schraw GJ, Norby, MM, Ronning RR. 2004. Cognitive psychology and instruction (4th ed. ed.). Upper Saddle River, N.J.: Pearson/Merrill/Prentice Hall
4. Professionalism must be taught
5. Behaviorism, Cognitivism, Constructivism: Comparing Critical Features from an Instructional Design Perspective