1.		The national and regional structures of official tourist organisations in european countries / by Robert Hollier for the European Travel Commission Autor: Hollier, Robert Data Publicação: 1995 Co col. autor sec.: ETC
2.		Demographic Change and tourism / World Tourism Organization; European Travel Commission Data Publicação: 2010 Col.autor: OMT ETC
3.		Understanding Russian Outbound Tourism / OMT, ETC Data Publicação: 2015 Col.autor: OMT ETC