Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Zemke, Ron, y Thomas K. Connellan. E-service: 24 Ways to Keep Your Customers When the Competition Is Just a Click Away. New York [etc.]: AMACOM, 2001.

Cita MLA (9a ed.)

Zemke, Ron, y Thomas K. Connellan. E-service: 24 Ways to Keep Your Customers When the Competition Is Just a Click Away. AMACOM, 2001.