APA

Ettenberg E., . (2002). The next economy: will you know where your customers are?. New York: McGraw Hill.

Chicago

Ettenberg Elliot, . 2002. The next economy: will you know where your customers are?. New York: McGraw Hill.

Harvard

Ettenberg E., . (2002). The next economy: will you know where your customers are?. New York: McGraw Hill.

MLA

Ettenberg Elliot, . The next economy: will you know where your customers are?. New York: McGraw Hill. 2002.