Brooks, W. (1988). Hingh impact selling. Prentice Hall.
Chicago-čujuhus (17. p.)Brooks, William. Hingh Impact Selling. New Delhi: Prentice Hall, 1988.
MLA-čujuhus (9. p.)Brooks, William. Hingh Impact Selling. Prentice Hall, 1988.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.