Novos turistas e a procura da sustentabilidade : Um novo segmento de mercado turístico (Anexo) / WTTC; WTO; Trad. Susana Lima
Tourism Recovery Committe for the Mediterranean Region : A joint initiative of Tunisia and Spain with the support of the WTO Business Council / World Tourism Organization. Market Intelligence and Promotion Section
Répertoire mondial des institutions d'éducation et de formation touristique / Organisation Mondiale du Tourisme
Evolucion del turismo a nivel mundial 1950-1991 / Organizacion Mundial del Turismo