World Health Organization. (2005). International travel and health: Situation as on 1 January 2005. World Health Organization.
Chicago Style (17th ed.) CitationWorld Health Organization. International Travel and Health: Situation as on 1 January 2005. Geneva: World Health Organization, 2005.
ציטוט MLAWorld Health Organization. International Travel and Health: Situation as on 1 January 2005. World Health Organization, 2005.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.