McCormick, J. B., Fisher-Hoch, S., & Horvitz, L. A. (1999). Level 4: Virus hunters of the CDC ([Updated ed.].). Barnes & Nobles Books.
Lua i Stíl Chicago (17ú heag.)McCormick, Joseph B., Susan Fisher-Hoch, agus Leslie Alan Horvitz. Level 4: Virus Hunters of the CDC. [Updated ed.]. New York: Barnes & Nobles Books, 1999.
Lua MLA (9ú heag.)McCormick, Joseph B., et al. Level 4: Virus Hunters of the CDC. [Updated ed.]. Barnes & Nobles Books, 1999.
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