APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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