Needle, D. (2009). Business in Context - 4th Ed. Cengage Learning.
Cita Chicago (17th ed.)Needle, David. Business in Context - 4th Ed. London: Cengage Learning, 2009.
Cita MLA (9th ed.)Needle, David. Business in Context - 4th Ed. Cengage Learning, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.