L' euro : incidences sur le tourisme / Organisation mondiale du tourisme
Tourism 2020 vision : East Asia and the Pacific / World Tourism Organization
Tourism 2020 vision : Europe / World Tourism Organization
The U. S. ecotourism market / World Tourism Organization
Le marché de l'écotourisme des États-Unis / Organisation Mondiale du Tourisme
Australia - the Asia and the Pacific intra-regional outbound series / World Tourism Organization
Hong Kong - the Asia and Pacific intra-regional outbound series / World Tourism Organization
Thailand - the Asia and Pacific intra-regional outbound series / World Tourism Organization
India - the Asia and Pacific intra-regional outbound series / World Tourism Organization
Japan - the Asia and Pacific intra-regional outbound series / World Tourism Organization