Cita APA (7a ed.)

Zemke, R., & Connellan, T. (2001). E-service: : 24 ways to keep your customers -when the comptetition is just a click away. AMACOM.

Cita Chicago Style (17a ed.)

Zemke, Ron, y Tom Connellan. E-service: : 24 Ways to Keep Your Customers -when the Comptetition Is Just a Click Away. New York: AMACOM, 2001.

Cita MLA (9a ed.)

Zemke, Ron, y Tom Connellan. E-service: : 24 Ways to Keep Your Customers -when the Comptetition Is Just a Click Away. AMACOM, 2001.