Fleck, F. (2003). Conference warns of danger of re-emergence of smallpox as weapon of bioterror. World Health Organization.
Čikaški stil citiranjaFleck, Fiona. Conference Warns of Danger of Re-emergence of Smallpox As Weapon of Bioterror. World Health Organization, 2003.
MLA način citiranjaFleck, Fiona. Conference Warns of Danger of Re-emergence of Smallpox As Weapon of Bioterror. World Health Organization, 2003.
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