Festinger, L. (1957). A Theory of Cognitive Dissonance, Row, Peterson: Evanston, Illinois.
Kelly, G. A. (1955). Psychology of Personal Constructs. Vol. 1. Norton: New York.
King, P. (1968). Alienation and the individual. British Journal of Social and Chemical Psychology, 7, 81–92.
Lang, K. (1964). Alienation. A Dictionary of the Social Sciences, pp. 19–20. Edited by Gould, J. and Kolb, W. L.. Tavistock: London.
Makhlouf-Norris, F. (1969). Concepts of the self and others in obsessional neurosis, studied by an adaptation of the role construct repertory grid. Unpublished Ph.D. thesis (Psychology), London University.
Makhlouf-Norris, F., Jones, H. G., and Norris, H. (1970). Articulation of the conceptual structure in obsessional neurosis. British Journal of Social and Clinical Psychology, 9, 264–274.
Sandler, J. (1955). A test of the significance of the difference between the means of correlated measures, based on a simplification of Student's. t British Journal of Psychology, 46, 225–226.
Siegel, S. (1956). Nonparametric Statistics for the Behavioral Sciences. McGraw-Hill: New York.
Slater, P. (1967). Notes on Ingrid 67, M.R.C, service for Analysing Repertory Grids. Biometrics Unit, Institute of Psychiatry: London University.