1. Averill, J. (1973). Personal control over aversive stimuli and its relationship to stress. Psychol. Bull., 80, 286
2. Bakan, P. (1963). Time of day preference, vigilance and extraversion and introversion. In Buckner, D. and McGrath, J. (eds) Vigilance: A Symposium. ( London: McGraw-Hill )
3. Banton, M. P. (1964). The Policeman in the Community. (London: Tavistock)
4. Beales, H. L. and Lambert, R. S. (1973). Memoirs of the Unemployed. (Wakefield: EP Publishing)
5. Beckhard, R. (1972). Optimizing team-building efforts. J. Contemp. Bus.,1, 23