3[3]M. David Merrill, Zhongmin Li & Mark K. Jones. Limitations of First Generation Instructional Design (ID1). Educational Technology, 1990.30(1).7- 11.
4David Merrill, Zhongmin Li & Mark K. Jones. Utah State University. Second Generation Instructional Design (ID2), Educational Technology, 1990.30(2).7- 14.
5M. David Merril. Utah State University, First Principles of Instruction. http://www. id2. usu. edu.
