Cita APA (7a ed.)

Zeithaml, V. A. (2003). Services marketing ed.3. McGraw-Hill.

Cita Chicago Style (17a ed.)

Zeithaml, Valarie A. Services Marketing Ed.3. McGraw-Hill, 2003.

Cita MLA (8a ed.)

Zeithaml, Valarie A. Services Marketing Ed.3. McGraw-Hill, 2003.