URBAN,Glen L. (1993). Design And Marketing Of New Products. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)URBAN,Glen L. Design And Marketing Of New Products. Prentice Hall, 1993.
Lua MLA (8ú heag.)URBAN,Glen L. Design And Marketing Of New Products. Prentice Hall, 1993.
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