Galka, R. J., & Baran, R. J. 1. (2017). Customer relationship management: The foundation of contemporary marketing strategy (Second Edition.). New York: Routledge.
Trích dẫn theo kiểu ChicagoGalka, Robert J.,, and Roger J. 1945- Baran. Customer Relationship Management: The Foundation of Contemporary Marketing Strategy. Second Edition. New York: Routledge, 2017.
Trích dẫn MLAGalka, Robert J.,, and Roger J. 1945- Baran. Customer Relationship Management: The Foundation of Contemporary Marketing Strategy. Second Edition. New York: Routledge, 2017.
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