1. Chandler, A. R. 1934.Beauty and Human Nature: Elements of Psychological Aesthetics, 381New York: D. Appleton-Century.
2. The Effect of Repetition on Ending Preferences in Melodies
3. Guilford, J. P. 1936.Psychometric Methods, 566New York: McGraw-Hill.
4. Optimum orders for the presentation of pairs in the method of paired comparisons.
5. Thorndike, E. L. 1932.Teacher's Word Book of 20,000 Words, 182New York: Columbia Univ., Teach. Coll. Pub.