APA-referens (7:e uppl.)
ebrary, Inc. (2005). International travel and health: Situation as on 1 January 2005. World Health Organization.
Chicago-referens (17:e uppl.)
ebrary, Inc. International Travel and Health: Situation as on 1 January 2005. Geneva: World Health Organization, 2005.
MLA-referens (9:e uppl.)
ebrary, Inc. International Travel and Health: Situation as on 1 January 2005. World Health Organization, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.