Turismo no Vale do Douro / Agência Portuguesa para o Investimento
Realidades e perspectivas do turismo em Portugal para o mercado sul-americano / Mário Baptista
The world cruise ship industry in the 1990s / Tony Peisley
Seminar on the ideal product, the ideal customer, the ideal company? : new perspectives in customer satisfaction research, London (UK) 27th-29th January 1993 / org. European Society for Opinion and Marketing Research