Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.