Gaya APA
Cooper, D, R., Schnindler, P, S.
(2008).
Business research methods
(
1th.ed.)
.
Singapore:
McGraw-Hill.
Gaya MLA
Cooper, Donald, R.., Schnindler, Pamela, S..
"Business research methods".
1th.ed.
Singapore:
McGraw-Hill,
2008.
Teks.