Cita APA (7th ed.)

ZIKMUND WILLIAM. (2013). BUSINESS RESEARCH METHODS (8TH ED.). CENGAGE LEARNING.

Cita Chicago (17th ed.)

ZIKMUND WILLIAM. BUSINESS RESEARCH METHODS. 8TH ED. ANDOVER: CENGAGE LEARNING, 2013.

Cita MLA (9th ed.)

ZIKMUND WILLIAM. BUSINESS RESEARCH METHODS. 8TH ED. CENGAGE LEARNING, 2013.