Erhorn, C., & Stark, J. (1994). Competing by design: Creating value and market advantage in new product development /Craig Erhorn and John Stark. Omneo.
Lua i Stíl Chicago (17ú heag.)Erhorn, Craig, agus John Stark. Competing by Design: Creating Value and Market Advantage in New Product Development /Craig Erhorn and John Stark. Essex Junction, VT: Omneo, 1994.
Lua MLA (9ú heag.)Erhorn, Craig, agus John Stark. Competing by Design: Creating Value and Market Advantage in New Product Development /Craig Erhorn and John Stark. Omneo, 1994.
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