Kurtosis: McNemar, Q. Psychological Statistics. Fourth edition. New York: Wiley 1969. p. 25
Critical Ratio of Kurtosis: Snedecor, G. W., and Cochran, W. G. Statistical Methods. Sixth edition. Ames, lowa: The lowa State University Press, 1967. p. 86
Table for testing kurtosis: Snedecor, G. W., and Cochran, W. G. Statistical Methods. Sixth edition. Ames, lowa: The lowa State University Press, 1967. p. 552
Geary's criterion for kurtosis: D'Agostino, R. B. Simple compact portable test of normality: Geary's test revisited. Psychological Bulletin 74 (1970):138-140.
SAS: UNIVARIATE, MEANS