Gaya APA

Barringer, B, R., Ireland, R, D. (2013). Entrepreneurship: successfully launching new ventures. Fourth Edition (Ed.ke-4). : Bumi Aksara.

Gaya MLA

Barringer, Bruce, R.., Ireland, R., Duane. "Entrepreneurship: successfully launching new ventures. Fourth Edition". Ed.ke-4 : Bumi Aksara, 2013. Text.