Ulrich, K. T. (2012). Product design and development Ed.5. Mc Graw-Hill.
Lua i Stíl Chicago (17ú heag.)Ulrich, Karl T. Product Design and Development Ed.5. Mc Graw-Hill, 2012.
Lua MLA (8ú heag.)Ulrich, Karl T. Product Design and Development Ed.5. Mc Graw-Hill, 2012.
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