Regulation, subject and programme of the international competition for the touristic development plan of side / Ministry of Tourism and Information
Turkish Airlines prevê chegar aos 10 voos semanais no Porto no Verão / Inês de Matos
Études Économiques de l'OCDE / Organisation de Coopération et de Développement Économiques
Determinants of demand for international tourist flows to Turkey / Muzaffer Uysal, John L. Crompton