Gaya APA
Cooper, D, R., Schnindler, P, S.
(2006).
Business research methods
(
9th.ed.)
.
Boston:
McGraw-Hill.
Gaya MLA
Cooper, Donald, R.., Schnindler, Pamela, S..
"Business research methods".
9th.ed.
Boston:
McGraw-Hill,
2006.
Teks.