Kaplan, J. M. (2003). Patterns of entrepreneurship. Jhon Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Kaplan, Jack M. Patterns of Entrepreneurship. Jhon Wiley & Sons, 2003.
Lua MLA (8ú heag.)Kaplan, Jack M. Patterns of Entrepreneurship. Jhon Wiley & Sons, 2003.
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