Cita APA (7th ed.)
Zikmund, W. G., & William G. (2003). Business research methods (7th ed.). Thompson South Western.
Cita Chicago (17th ed.)
Zikmund, William G., i William G. Business Research Methods. 7th ed. Oklahoma State Univesity.: Thompson South Western, 2003.
Cita MLA (9th ed.)
Zikmund, William G., i William G. Business Research Methods. 7th ed. Thompson South Western, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.