1. Tourism Statistics 1988–1992;WTO (World Tourism Organization),1994
2. Travel and Tourism Economic Perspective;WTTC (World Travel and Tourism Council),1995
3. Quality and competitiveness in the New Age of Tourism;Fayos-Solá,1994
4. Tourism, Technology and Competitive Strategies;Poon,1993
5. The strategic role of trade fairs in the new age of tourism;Fayos-Solá;Tourism Management,1994