Gaya APA

IRELAND, R, D., BARRINGER, B, R. (2019). Entrepreneurship : Successfully Launching New Ventures (6). USA: Pearson Education Limited.

Gaya MLA

IRELAND, R., DUANE., BARRINGER, BRUCE, R.. "Entrepreneurship : Successfully Launching New Ventures". 6 USA: Pearson Education Limited, 2019. Text.