Citazione Stile APA (7a Edizione)
ebrary, Inc. (2005). International travel and health: Situation as on 1 January 2005. World Health Organization.
Citazione stile Chigago Style (17a edizione)
ebrary, Inc. International Travel and Health: Situation as on 1 January 2005. Geneva: World Health Organization, 2005.
Citatione MLA (9a ed.)
ebrary, Inc. International Travel and Health: Situation as on 1 January 2005. World Health Organization, 2005.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.