Cooper, D. R. S. (2010). Business Research Methods (11th.). Tata McGraw Hill.
Cita Chicago (17th ed.)Cooper, Donald R.; Schindler. Business Research Methods. 11th. NEw Delhi: Tata McGraw Hill, 2010.
Cita MLA (9th ed.)Cooper, Donald R.; Schindler. Business Research Methods. 11th. Tata McGraw Hill, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.