2000. International travel and health: Vaccination requirements and health advice : situation as on 1 January 2000. Geneva: World Health Organization.
Citace podle APA (7th ed.)(2000). International travel and health: Vaccination requirements and health advice : situation as on 1 January 2000. World Health Organization.
Citace podle Chicago (17th ed.)International Travel and Health: Vaccination Requirements and Health Advice : Situation as on 1 January 2000. Geneva: World Health Organization, 2000.
Citace podle MLA (9th ed.)International Travel and Health: Vaccination Requirements and Health Advice : Situation as on 1 January 2000. World Health Organization, 2000.
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