Gaya APA

Barringer, B, R., Ireland, R, D. (2012). Entrepreneurship: Succesfully Launching New Ventures Fourth Edition (4). United States of America: Prentice hall, INC.

Gaya MLA

Barringer, Bruce, R., Ireland, R, Duane. "Entrepreneurship: Succesfully Launching New Ventures Fourth Edition". 4 United States of America: Prentice hall, INC, 2012. Texts.