Gaya APA

Timmons, J, A., Spinelli, S. (2007). New venture creation : entrepreneurship for the 21st century (7Th Ed.). Singapore: McGraw-Hill.

Gaya MLA

Timmons, Jeffry, A.., Spinelli, Stephen. "New venture creation : entrepreneurship for the 21st century". 7Th Ed. Singapore: McGraw-Hill, 2007. Text.