Tourism satellite account: recommended methodological framework / United Nations [et al]
Developments and challenges in the hospitality ant tourism sector / International Labour Office Geneva
Travel & tourism economic impact: Portugal / World Travel & Tourism Council
A constelação do turismo na economia portuguesa : Portugal desafios nos alvores do século XXI / Ernâni Rodrigues Lopes
Acciones de la Comisión Europea en el campo del turismo / Luca del Colombo, Iuliana Aluas e Francesca Tudini