Gaya APA
International Travel and Health. (2005).
Geneva:
WHO.
Gaya Chicago
International Travel and Health.
.
Geneva:
WHO,
2005.
Text.
Gaya MLA
International Travel and Health.
.
Geneva:
WHO,
2005.
Text.
Gaya Turabian
International Travel and Health.
Geneva:
WHO,
2005.
Print.