Gaya APA

Timmons, J, A., Spinelli, S. (2009). New Venture Creation : entrepreneurship for the 21st Century . New York: Mc-Graw-Hill.

Gaya MLA

Timmons, Jeffry, A.., Spinelli, Stephen. "New Venture Creation : entrepreneurship for the 21st Century". New York: Mc-Graw-Hill, 2009. Text.