Παραπομπή σε μορφή APA (7η εκδ.)

Zeithaml, V. A. (2006). Services marketing ed.4: Integrating customer focus across the firmValarie A. Zeithaml, Mary Jo Bitner. McGraw-Hill.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Zeithaml, Valarie A. Services Marketing Ed.4: Integrating Customer Focus Across the FirmValarie A. Zeithaml, Mary Jo Bitner. McGraw-Hill, 2006.

Παραπομπή σε μορφή MLA (8th εκδ.)

Zeithaml, Valarie A. Services Marketing Ed.4: Integrating Customer Focus Across the FirmValarie A. Zeithaml, Mary Jo Bitner. McGraw-Hill, 2006.