Primera convencion nacional de turismo, Mérida Estado de Mérida, 25 al 29 de Octobre de 1961 / Republica De Venezuela. Ministerio de Fomento. Direccion de Turismo
Environment in the European Union at the turn of the century / European Environment Agency
Strategic management in tourism / Luiz Moutinho
Data collection and analysis for tourism management, marketing and planning : a manual for managers and analysts / OMT