1996. International travel and health: Vaccination requirements and health advice. Geneva: WHO.
Citace podle APA (7th ed.)(1996). International travel and health: Vaccination requirements and health advice. WHO.
Citace podle Chicago (17th ed.)International Travel and Health: Vaccination Requirements and Health Advice. Geneva: WHO, 1996.
Citace podle MLA (9th ed.)International Travel and Health: Vaccination Requirements and Health Advice. WHO, 1996.
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