1. 1 . Hobbs N. The Future of Children: Categories. Labeis. and Their Consequences. San Francisco: Jossey-Bass 1975.
2. 2. Phillips L Draguns. J. G. and Bartlett. D. P. Classifbation of behavior disorder In Hobbs N. (ed.) Issues in the Classification of Children. Volume 1. San Francisco: Jossey-Bass 1975 pp. 26-55
3. 3. Prugh. D. Engel M.. and Morse. W. C. Emotional disturbance in children. In Hobbs N.. op. cit.. pp. 261-299.
4. 4. Rutter. M. et al. A tri-axial classification of mental disorders in childhood. J. Child Psychol. Psychiatry 10 (1969). 41-61.
5. 5. Zigler. E.. and Phillips. L. Psychiatric diagnosis. A critique J. Abnorm. Soc Psychol. 63 (1961) 607-618.