ebrary, Inc. (2006). Customer loyalty, retention, and customer relationship management. Emerald Group Publishing.
Tohutoru Kātū Chicago (17th ed.)ebrary, Inc. Customer Loyalty, Retention, and Customer Relationship Management. Bradford, England: Emerald Group Publishing, 2006.
Tohutoro MLA (9th ed.)ebrary, Inc. Customer Loyalty, Retention, and Customer Relationship Management. Emerald Group Publishing, 2006.
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