APA (7e ed.) Bronvermelding
World Health Organization & ebrary, Inc. (2007). International travel and health: Situation as on 1 January 2007. World Health Organization.
Chicago (17e ed.) Bronvermelding
World Health Organization en Inc ebrary. International Travel and Health: Situation as on 1 January 2007. Geneva: World Health Organization, 2007.
MLA (9e ed.) Bronvermelding
World Health Organization en Inc ebrary. International Travel and Health: Situation as on 1 January 2007. World Health Organization, 2007.
Let op: Deze citaties zijn niet altijd 100% accuraat.