Gaya APA
Cooper, Donald R.. (2006).
Business research methods (ninth edition).
New York:
McGraw-Hill/Irwin.
Gaya Chicago
Cooper, Donald R..
Business research methods.
ninth edition
New York:
McGraw-Hill/Irwin,
2006.
MPK.
Gaya MLA
Cooper, Donald R..
Business research methods.
ninth edition
New York:
McGraw-Hill/Irwin,
2006.
MPK.
Gaya Turabian
Cooper, Donald R..
Business research methods.
ninth edition
New York:
McGraw-Hill/Irwin,
2006.
MPK.