Zeithaml, V. A. Services Marketing (2022.). McGraw Hill Education (India) Private Limited.
Chicago-viite (17. p.)Zeithaml, Valarie A. Services Marketing. 2022. McGraw Hill Education (India) Private Limited.
MLA-viite (9. p.)Zeithaml, Valarie A. Services Marketing. 2022. McGraw Hill Education (India) Private Limited.
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