1. General Dental Council. 'The First Five Years'. London: Revised Edition (draft) 2001.
2. Baron RA, Byrne DE Social Psychology. New York: Allyn & Bacon 2000.
3. Deaux K, Dane FC, Wrightsman LS Social Psychology in the 90s. 6th ed California: Brooks Cole, Pacific Grove 1993.
4. Ajzen I, Fishbein M Understanding Attitudes and Predicting Social Behavior. New Jersey: Prentice-Hall 1980.
5. McGuire WJ Attitudes and Attitude Change. In Lindsey G, Artonson E (eds) Handbook of Social Psychology. 3rd ed, Volume 2 pp333–346 New York: Random House 1985.