Ettenberg, E. (2002). The next economy: Will you know where your customers are?
Cita Chicago (17th ed.)Ettenberg, Elliott. The Next Economy: Will You Know Where Your Customers Are? New Delhi, 2002.
Cita MLA (9th ed.)Ettenberg, Elliott. The Next Economy: Will You Know Where Your Customers Are? 2002.
Atenció: Aquestes cites poden no estar 100% correctes.