1.		Global tourism forecasts to the year 2000 and beyond / Published by the World Tourism Organization Data Publicação: 1994- Col.autor: OMT
2.		Aviation and tourism policies : balancing the benefits / World Tourism Organization Data Publicação: 1994 Co col. autor sec.: OMT
3.		Budgets of national tourism administrations : 1994 / World Tourism Organization Data Publicação: 1994 Col.autor: OMT
4.		Marketing plans & strategies of national tourism administrations / World Tourism Organization Data Publicação: 1994 Col.autor: OMT