Tracy, B. (2007). The Art of Closing the Sale. AMACOM.
Chicago-čujuhus (17. p.)Tracy, Brain. The Art of Closing the Sale. New York: AMACOM, 2007.
MLA-čujuhus (9. p.)Tracy, Brain. The Art of Closing the Sale. AMACOM, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.