Hiebeler, R. (1998). Best Practices: Building your business with customer - focused solutions. Simon & Schuster.
Chicago-čujuhus (17. p.)Hiebeler, Robert. Best Practices: Building Your Business with Customer - Focused Solutions. Simon & Schuster, 1998.
MLA-čujuhus (9. p.)Hiebeler, Robert. Best Practices: Building Your Business with Customer - Focused Solutions. Simon & Schuster, 1998.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.