Gaya APA
Cooper, D, R., Schindles, P, S.
(2011).
Business research methods 11 ed.
(
11)
.
Boston:
McGraw-Hill.
Gaya MLA
Cooper, Donald, R.., Schindles, Pamela, S..
"Business research methods 11 ed.".
11
Boston:
McGraw-Hill,
2011.
Text.