Nelson, R. (2009). The greatest sales training in the world. Jaico Publishing House.
Chicago-čujuhus (17. p.)Nelson, Robert. The Greatest Sales Training in the World. Ahmedabad: Jaico Publishing House, 2009.
MLA-čujuhus (9. p.)Nelson, Robert. The Greatest Sales Training in the World. Jaico Publishing House, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.