1. Brennan, T. and Auslander, N. (1979), Adolescent loneliness Boulder Co. Behavioral Research Institute.
2. Clark E., Moustak as (1972), Loneliness and love. Cliffs, new Jerrsey, Prentice Hall, Inc.
3. Bread burn, N. (1969) The structure of Psychological well being, Chicago Aldine.
4. Lynch, J.J. (1977), The broken heart : The medical consequences of loneliness in America. New York : Basic Books.
5. Murphy, P.A. (1991), Parental death in childhood and loneliness in young adults. Omega, Journal of Death and Dying, 17, 219-228.
6. Perlman and Peplau, L.A. (1981), Towards a social psychological of loneliness. In S Duck and R. Gilmour (Eds.) Personal relationship personal relationship in disorder , London : Academic Press.
7. Wilson, W. (1967), Correlates of avowed happiness Psychological Bulletin 67, 294-306.
8. Young, J. (1979) Loneliness in college student Community approaches, Doctoral dissertation, Dissertation Abstract International, 40, 199.
9. Young, J. E. (1982) Loneliness depression and cognitive therapy. Theory and application in Peplau.
10. Scheier, M.F. and Carver, C.S. (1985) Optimism, coping and health: Assessment and implications of generalized outcome expectancies, health psychology, 4,219-247.