Timm, P. R. Eliminate customer turnoffs. Jack Wilson and Associates.
Chicago-čujuhus (17. p.)Timm, Paul R. Eliminate Customer Turnoffs. Illonois, Chicago: Jack Wilson and Associates.
MLA-čujuhus (9. p.)Timm, Paul R. Eliminate Customer Turnoffs. Jack Wilson and Associates.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.