References
- David , Henry P. and Rabinowitz , William . 1951 . The development of a Szondi instability score . J. Consult. Psychol , 15 : 334 – 336 .
- Deri , Susan K. 1949 . Introduction to the Szondi Test , New York : Grune and Stratton .
- Edwards , A. L. 1946 . Statistical Analysis , New York : Rinehart .