1.		Agenda 21 for the travel & tourism industry : towards environmentally sustainable development / World Travel & Tourism Council; World Tourism Organization Data Publicação: 1997 Co col. autor sec.: World Travel & Tourism Council OMT Earth Council
2.		Steps to success : global good practices in travel & tourism human resource development / World Travel & Tourism Council, World Travel & Tourism Human Resource Centre Data Publicação: 1998 Col.autor: World Travel & Tourism Council Co col. autor: World Travel & Tourism Human Resource Centre
3.		Progress and priorities 2004/2005 / World Travel & Tourism Council Data Publicação: 2005 Col.autor: World Travel & Tourism Council