1. Bachman, J., Johnston, L. D. & O'Malley, P. M. (1993). Monitoring the future. Ann Arbor: University of Michigan Institute for Social Research.
2. Berzonsky, M. D. (1990). Self-construction over the life-span: A process perspective on identity formation. In G. J. Neimeyer & R. A. Neimeyer (Eds.), Advances in personal construct psychology (Vol. 1, pp. 155-186). Greenwich, CT: JAI.