Lua APA (7ú heag.)
ebrary, Inc. (2003). State of the world's vaccines and immunization (Rev. ed. 2003.). World Health Organization.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc. State of the World's Vaccines and Immunization. Rev. ed. 2003. [Geneva]: World Health Organization, 2003.
Lua MLA (9ú heag.)
ebrary, Inc. State of the World's Vaccines and Immunization. Rev. ed. 2003. World Health Organization, 2003.
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