Ettenberg, E. (2002). The next economy: Will you know where your customers are?
Chicago Style aipamenaEttenberg, Elliott. The Next Economy: Will You Know Where Your Customers Are? New Delhi, 2002.
MLA aipamenaEttenberg, Elliott. The Next Economy: Will You Know Where Your Customers Are? 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.