BETZ, F. (1987). Managing Technology Competing Trough New Ventures, Innovation And Corporate Research Frederick Betz. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)BETZ, Frederick. Managing Technology Competing Trough New Ventures, Innovation And Corporate Research Frederick Betz. Prentice Hall, 1987.
Lua MLA (8ú heag.)BETZ, Frederick. Managing Technology Competing Trough New Ventures, Innovation And Corporate Research Frederick Betz. Prentice Hall, 1987.
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