APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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