1. The Centre for Leisure and Tourism Studies (1989, EIF Exhibition Effectiveness Survey, The Centre for Leisure and Tourism Studies, pp. 3‐4.
2. The Exhibition Industry Federation (1990, The UK Exhibition Industry ‐ The Facts, The Exhibition Industry Federation, London, p. 12.
3. Taylor Nelson Business Services (1991, Exhibition Effectiveness(Stage 1), Taylor Nelson Business Services, Epsom, p. 13.
4. Keynote (1991, Exhibition and Conference Organisers, Key Note Publications, Hampton, p. 2.
5. Incorporated Society of British Advertisers (1991, Exhibition Expenditure Survey, Incorporated Society of British Advertisers, London.