APA-viite (7. p.)
ebrary, Inc. (1999). Assessment of future scientific needs for live variola virus. National Academy Press.
Chicago-viite (17. p.)
ebrary, Inc. Assessment of Future Scientific Needs for Live Variola Virus. Washington, D.C.: National Academy Press, 1999.
MLA-viite (9. p.)
ebrary, Inc. Assessment of Future Scientific Needs for Live Variola Virus. National Academy Press, 1999.
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