APA aipamena

ZEITHAML VALARIE A. (1990). DELIVERING QUALITY SERVICE: BALANCING CUSTOMER PERCEPTIONS AND EXPECTIONS. FREE PRESS.

Chicago Style aipamena

ZEITHAML VALARIE A. DELIVERING QUALITY SERVICE: BALANCING CUSTOMER PERCEPTIONS AND EXPECTIONS. NEW YORK: FREE PRESS, 1990.

MLA aipamena

ZEITHAML VALARIE A. DELIVERING QUALITY SERVICE: BALANCING CUSTOMER PERCEPTIONS AND EXPECTIONS. FREE PRESS, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.