Ulrich, K. T. (2020). Product Design and Development (7th.). McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Ulrich, Karl T. Product Design and Development. 7th. McGraw Hill, 2020.
Lua MLA (9ú heag.)Ulrich, Karl T. Product Design and Development. 7th. McGraw Hill, 2020.
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