Berelson, B. (1971). Content analysis in communication research. New York: Hafner Publishing Company.

Bruner, J. (1986) Models of the learner. Educational Horizons, 64 (4), 197 200

Carley, K. (1990). Content analysis. In R.E. Asher (Ed.), The Encyclopedia of Language and Linguistics. Edinburgh: Pergamon Press.

Carley, K., & Palmquist, M. (1992). Extracting, representing and analyzing mental models. Social Forces, 70 (3), 601-636.

Dale, E. (1969). Audio-visual methods in teaching. New York: Dryden, 3rd edition.

Festinger, L. (1957). A Theory of Cognitive Dissonance. Stanford, CA: Stanford University Press

Irving B. Weiner. (1998). Principals of Rorschach Interpretation. New Jersey, Lawrence Erlbaum Associates, Inc.

Kirk.J. & Miller. M. (1985). Reliability and Validity in Qualitative Research. USA, Sage Publications, Inc.

Mayer, R. E. (1982) Memory for algebra story problems. Journal of Educational psychology, 74, 199-216.

Palmquist, M. E. (1990). The lexicon of the classroom: language and learning in writing class rooms. Doctoral dissertation, Carnegie Mellon University, Pittsburgh, PA.

Quilliam. S. (2004). Body Language, New York, Fire Fly Book inc.

Roberts, C.W. (1989). Other than counting words: A linguistic approach to content analysis. Social Forces, 68, 147-177.

Satterly, D (1987) "Piaget and Education" in R L Gregory (ed.) The Oxford Companion to the Mind Oxford University Press

Vinner, S. (1983). The concept definition, concept image, and the notation of function. International Journal of Mathematics Education in Science,6 (2).