Παραπομπή APA

Zikmund, W. G. (2003). Business research methods (7th ed.). Thomson Asia pvt ltd.

Παραπομπή Chicago Style

Zikmund, William G. Business Research Methods. 7th ed. Singapore: Thomson Asia pvt ltd, 2003.

Παραπομπή MLA

Zikmund, William G. Business Research Methods. 7th ed. Thomson Asia pvt ltd, 2003.