Kumar, V. (2018). Customer Relationship Management: Concept, Strategy, and Tools (3rd ed. 2018.). Springer Berlin Heidelberg.
Citácia podle Chicago (17th ed.)Kumar, V. Customer Relationship Management: Concept, Strategy, and Tools. 3rd ed. 2018. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018.
Citácia podľa MLA (8th ed.)Kumar, V. Customer Relationship Management: Concept, Strategy, and Tools. 3rd ed. 2018. Springer Berlin Heidelberg, 2018.
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