Schiffman, S. (1998). Make it your business [soundrecording]: The definitive guide to launching, managing and succeeding in your own business. Simon & Schuster.
Cita Chicago (17th ed.)Schiffman, Stephan. Make It Your Business [soundrecording]: The Definitive Guide to Launching, Managing and Succeeding in Your Own Business. New York: Simon & Schuster, 1998.
Cita MLA (9th ed.)Schiffman, Stephan. Make It Your Business [soundrecording]: The Definitive Guide to Launching, Managing and Succeeding in Your Own Business. Simon & Schuster, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.