Cofnodi Dyfyniadau
Dyfyniad APA
ebrary, Inc. (2005). International travel and health: Situation as on 1 January 2005. World Health Organization.
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Dyfyniad Arddull Chicago
ebrary, Inc. International Travel and Health: Situation as on 1 January 2005. Geneva: World Health Organization, 2005.
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Dyfyniad MLA
ebrary, Inc. International Travel and Health: Situation as on 1 January 2005. World Health Organization, 2005.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.