Tucker, R. (2000). Customer service for the new millennium. East west Books.
Chicago-čujuhus (17. p.)Tucker, Robert. Customer Service for the New Millennium. Chennai: East west Books, 2000.
MLA-čujuhus (9. p.)Tucker, Robert. Customer Service for the New Millennium. East west Books, 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.