APA Style
Zikmund, William G.. (1991).
Business Research Methods .
:
Dryden.
Chicago Style
Zikmund, William G..
Business Research Methods.
:
Dryden,
1991.
Text.
MLA Style
Zikmund, William G..
Business Research Methods.
:
Dryden,
1991.
Text.
Turabian Style
Zikmund, William G..
Business Research Methods.
:
Dryden,
1991.
Print.