Gaya APA
Cooper, D, R., Schindler, P, S.
(2011).
Business Research Methods
(
11)
.
New York:
Mc Graw Hill.
Gaya MLA
Cooper, Donald, R.., Schindler, Pamela, S..
"Business Research Methods".
11
New York:
Mc Graw Hill,
2011.
Text.