1. in a speech delivered to the 10th General Assembly of the World Tourism Organisation;Lipman,1993
2. The EC Directive on Package Travel, Package Holidays and Package Tours (90/314/EEC): ‘The EC Directive’.
3. A Practical Guide to Package Holiday Law and Contracts;Nelson-Jones,1993
4. Marketing in Travel & Tourism;Middleton,1985
5. Marketing in Travel & Tourism;Middleton,1985