APA-ийн эшлэл(7 дахь хэвлэлт)
World Health Organization & ebrary, Inc. (2009). International travel and health: Situation as on 1 January 2009. World Health Organization.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
World Health Organization ба Inc ebrary. International Travel and Health: Situation as on 1 January 2009. Geneva: World Health Organization, 2009.
MLA -ийн эшлэл (9 дэх хэвлэлт)
World Health Organization ба Inc ebrary. International Travel and Health: Situation as on 1 January 2009. World Health Organization, 2009.
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