Campbell, D. T. and Fiske, D. W.Convergent and discriminant validation by the multitrait-multimethod matrix. Psychological Bulletin, 1959, 56, 81-105.
2.
Erikson, E. H.Growth and crisis of the "healthy personality." In M.J.E.Senn (Ed.), Symposium on the healthy personality, Supplement II: Problems of infancy and childhood . New York: Josiah Macy, Jr. Foundation , 1950.
3.
Erikson, E. H.Identity and the life cycle: Selected papers. Psychological Issues, 1959.
4.
Renner, K. E., Maher, B. A., and Campbell, D. T.The validity of a method for scoring sentence-completion responses for anxiety, dependency, and hostility. Journal of Applied Psychology , 1962, 4, 285-290.
