Adams J., Hayes, J. and Hopkins, B. (1976), Transition Understanding and Managing Personal Change, Martin Robertson, London
2.
Beckhard, R. and Harris, R.T. (1987), Organisational Transition. Managing Complex Change , Addison-Wesley, London
3.
Beckhard, R. (1989), 'A model for the executive/management of transformational change', The 1989 Annual Developing Human Resources, University Associates
4.
Morgan, R G T (1987), 'Some observations on mission/vision building ', Shell U.K. Ltd. Internal Paper, p. 4