Berkovi, J. (2014). Effective client management in professional services: How to build successful client relationships. Gower Publishing Limited : Gower Publishing Company.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Berkovi, Jack. Effective Client Management in Professional Services: How to Build Successful Client Relationships. Surrey, England ; Burlington, Vermont: Gower Publishing Limited : Gower Publishing Company, 2014.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Berkovi, Jack. Effective Client Management in Professional Services: How to Build Successful Client Relationships. Gower Publishing Limited : Gower Publishing Company, 2014.
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