Παραπομπή σε μορφή APA (7η εκδ.)

Zeithaml, V. A. (2003). Services marketing ed.3integrating customer focus across the firmValarie A. Zeithaml, Mary Jo Bitner. McGraw-Hill.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Zeithaml, Valarie A. Services Marketing Ed.3integrating Customer Focus Across the FirmValarie A. Zeithaml, Mary Jo Bitner. McGraw-Hill, 2003.

Παραπομπή σε μορφή MLA (8th εκδ.)

Zeithaml, Valarie A. Services Marketing Ed.3integrating Customer Focus Across the FirmValarie A. Zeithaml, Mary Jo Bitner. McGraw-Hill, 2003.