APA-Zitierstil (7. Ausg.)
World Health Organization & ebrary, Inc. (2002). International travel and health: Situation as on 1 January 2002. Woam d Health Organization.
Chicago-Zitierstil (17. Ausg.)
World Health Organization und Inc ebrary. International Travel and Health: Situation as on 1 January 2002. Geneva: Woam d Health Organization, 2002.
MLA-Zitierstil (9. Ausg.)
World Health Organization und Inc ebrary. International Travel and Health: Situation as on 1 January 2002. Woam d Health Organization, 2002.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.