Cita APA
World Health Organization & ebrary, Inc. (2008). International travel and health: Situation as on 1 January 2008. World Health Organization.
Citación estilo Chicago
World Health Organization and Inc ebrary. International Travel and Health: Situation as on 1 January 2008. Geneva: World Health Organization, 2008.
Cita MLA
World Health Organization and Inc ebrary. International Travel and Health: Situation as on 1 January 2008. World Health Organization, 2008.
Warning: These citations may not always be 100% accurate.