Gaya APA
BARRINGER, B, R., IRELAND, R, D.
(2012).
Entrepreneurship :
(
4th ed.)
.
Boston:
Pearson.
Gaya MLA
BARRINGER, Bruce, R.., IRELAND, R., Duane.
"Entrepreneurship :".
4th ed.
Boston:
Pearson,
2012.
Buku.