Cita APA (7th ed.)

Cooper, D. (2006). BUSINESS RESEARCH METHODS (9th.). McGraw Hill.

Cita Chicago (17th ed.)

Cooper, Donald. BUSINESS RESEARCH METHODS. 9th. New Delhi: McGraw Hill, 2006.

Cita MLA (9th ed.)

Cooper, Donald. BUSINESS RESEARCH METHODS. 9th. McGraw Hill, 2006.