Timmons, J. A., & Spinelli, S. (2009). New venture creation: Entrepreneurship for the 21st century (8th ed.). Boston: McGraw-Hill/Irwin.

Timmons, Jeffry A., و Stephen Spinelli. New Venture Creation: Entrepreneurship for the 21st Century. 8th ed. Boston: McGraw-Hill/Irwin, 2009.

Timmons, Jeffry A., و Stephen Spinelli. New Venture Creation: Entrepreneurship for the 21st Century. 8th ed. Boston: McGraw-Hill/Irwin, 2009.