Cita APA (7th ed.)

Zikmund, W. G. (2008). Business research methods. Cengage Learbubg.

Cita Chicago (17th ed.)

Zikmund, William G. Business Research Methods. New Delhi: Cengage Learbubg, 2008.

Cita MLA (9th ed.)

Zikmund, William G. Business Research Methods. Cengage Learbubg, 2008.