Kumar, V. (2013). Profitable Customer Engagement: Concepts, Metrics, and Strategies. SAGE Publications India Pvt. Ltd.
Citace podle Chicago (17th ed.)Kumar, V. Profitable Customer Engagement: Concepts, Metrics, and Strategies. New Delhi: SAGE Publications India Pvt. Ltd, 2013.
Citace podle MLA (9th ed.)Kumar, V. Profitable Customer Engagement: Concepts, Metrics, and Strategies. SAGE Publications India Pvt. Ltd, 2013.
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