APA (7e ed.) Bronvermelding
World Health Organization & ebrary, Inc. (2002). International travel and health: Situation as on 1 January 2002. Woam d Health Organization.
Chicago (17e ed.) Bronvermelding
World Health Organization en Inc ebrary. International Travel and Health: Situation as on 1 January 2002. Geneva: Woam d Health Organization, 2002.
MLA (9e ed.) Bronvermelding
World Health Organization en Inc ebrary. International Travel and Health: Situation as on 1 January 2002. Woam d Health Organization, 2002.
Let op: Deze citaties zijn niet altijd 100% accuraat.