Garrett, H. E.Statistics in Psychology and Education. New York: Longmans, Green & Co., Inc., 1947.
2.
Harris, F. J., Howell, M. A., and Newman, S. H. " Forced Choice Tetrads—Effect of Scoring Procedure and Key Length on Validity and Reliability." EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT , XVI (1956), 454-464.
3.
Lubin, A. and Summerfield, A. A. "A Square Root Method of Selecting a Minimum Set of Variables in Multiple Regression: II. A Worked Sample." Psychometrika, XVI (1951), 425-438.
4.
Newman, S. H. "The Officer Selection and Evaluation Program of the U. S. Public Health Service." American Journal of Public Health, XLI (1951), 1395-1402.
5.
Newman, S. H., Howell, M. A., and Harris, F. J. " Forced Choice and Other Methods for Evaluating Professional Health Personnel ." Psychological Monographs, LXXI(10), (1957), No. 439.
6.
Summerfield, A. A. and Lubin, A. "A Square Root Method of Selecting a Minimum Set of Variables in Multiple Regression. I. The Method." Psychometrika , XVI (1951), 271-284.
7.
Thorndike, R. L.Personnel Selection. New York: John Wiley & Sons, Inc. , 1949.