1. Adler, Mortimer J. Six Great Ideas. New York: Macmillan, 1981.
2. Berlyne, Daniel E. Aesthetics and Psychobiology New York: Appleton-Century-Crofts, 1971.
3. Berlyne, Daniel E. Studies in the New Experimental Aesthetics: Steps Toward an Objective Psychology of Aesthetic Appreciation. New York: John Wiley & Sons, 1974.
4. Best, Roger J. ?An Experiment in Delphi Estimation in Marketing Decision Making.? Journal of Marketing Research 11 (November 1974), 447?468.
5. Gernet, Sterling K. ?Musical Discrimination at Various Age and Grade Levels.? Doctoral dissertation, Teachers College, Temple University, Philadelphia, PA, 1939.