1.		Recommendations on tourism statistics / United Nations, World Tourism Organization Data Publicação: 1994 Co col. autor: United Nations Co col. autor sec.: OMT COTA(S): 6027.1; 6027.1-a
2.		International recommendations for tourism statistics 2008 / United Nations Publication Data Publicação: 2010 Col.autor: United Nations COTA(S): 12478; 12478.a