Gaya APA
COOPER, D, R., SCHINDKER, P, S.
(2014).
Business research methods
(
12th ed.)
.
Boston:
McGraw-Hill Irwin.
Gaya MLA
COOPER, Donald, R.., SCHINDKER, Pamela, S..
"Business research methods".
12th ed.
Boston:
McGraw-Hill Irwin,
2014.
Buku.