Hiebeler, R. (1998). Best Practices: Building your business with customer - focused solutions. Simon & Schuster.
Chicago-viite (17. p.)Hiebeler, Robert. Best Practices: Building Your Business with Customer - Focused Solutions. Simon & Schuster, 1998.
MLA-viite (9. p.)Hiebeler, Robert. Best Practices: Building Your Business with Customer - Focused Solutions. Simon & Schuster, 1998.
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