ebrary, Inc. (2006). Customer loyalty, retention, and customer relationship management. Emerald Group Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रebrary, Inc. Customer Loyalty, Retention, and Customer Relationship Management. Bradford, England: Emerald Group Publishing, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रebrary, Inc. Customer Loyalty, Retention, and Customer Relationship Management. Emerald Group Publishing, 2006.
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