Ulrich, K. T., & Eppinger, S. D. (2008). Product design and development (4th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Ulrich, Karl T., agus Steven D. Eppinger. Product Design and Development. 4th ed. Boston: McGraw-Hill, 2008.
Lua MLA (9ú heag.)Ulrich, Karl T., agus Steven D. Eppinger. Product Design and Development. 4th ed. McGraw-Hill, 2008.
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