Não informado. (2000). Ziff Davis Smart Business for the New Economy. Ziff Davis Media.
Lua i Stíl Chicago (17ú heag.)Não informado. Ziff Davis Smart Business for the New Economy. New York: Ziff Davis Media, 2000.
Lua MLA (8ú heag.)Não informado. Ziff Davis Smart Business for the New Economy. Ziff Davis Media, 2000.
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