1. Aversa, F.Research in formative evaluation: A comparison of the response to a television program in three stages of completion. Paper presented at the annual meeting of the Association for Educational Communications and Technology, Miami, April 1977.
2. Bransford, R. K. Instructional development.Educational Communication and Technology, 1978,26(2), 123–132.
3. Cronbach, L. J. Course improvement through evaluation.Teachers College Record, 1963,64(8), 672–683.
4. Palmer, E. L. Formative research in the production of television for children. In E. O. Olson (Ed.),Media and symbols: The forms of expression, communication, and education (73rd NSSE Yearbook, Part I). Chicago: National Society for the Study of Education, 1974.