Cohen, J.Statistical power analysis for the behavioral sciences. New York: Academic Press, 1969.
2.
Cohen, J.Approximate power and sample size determination for common one-sample and two-sample hypothesis tests. EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, 1970, 30, 811-831.
3.
Cohen, J. and Cohen, P.Applied multiple regression/correlation analysis for the behavioral sciences . Hillsdale, N.J.: Erlbaum , 1975.
4.
Katzell, R. A. and Dyer, F. J.Differential validity revived. Journal of Applied Psychology, 1977, 62, 137-145.
5.
McHugh, R. B.Determining sample size in validation research, EDUCATIONAL AND PSYCHOLOGICAL MEASUREMENT, 1957, 17, 136-141.